Volume 34,Issue 8,2005 Table of Contents
2005, 34(8).
Abstract:
In this paper,Diffuse-interface field model and Khachaturyan elastic strain energy model are coupled to investigate the morphologyical evolutions and kinetics process controlled by transformation-induced elastic strain (include external strain field) during spinodal decomposition in a symmetrical composition case. The simulation results indicate that precipitates are preferentially oriented along elalstic soft directions with an external stress for an inhomogeneous elastic modulus system.
In this paper,Diffuse-interface field model and Khachaturyan elastic strain energy model are coupled to investigate the morphologyical evolutions and kinetics process controlled by transformation-induced elastic strain (include external strain field) during spinodal decomposition in a symmetrical composition case. The simulation results indicate that precipitates are preferentially oriented along elalstic soft directions with an external stress for an inhomogeneous elastic modulus system.
2005, 34(8):1177-1180.
Abstract:
The history and present developments of solid oxide fuel cells (SOFC) were reviewed. The operating principle of SOFC together with requirements from every part of SOFC was interpreted. After analyzing the development and problems of anode, cathode, electrolyte and interconnect material, the key problems for the application of solid oxide fuel cells were suggested.
The history and present developments of solid oxide fuel cells (SOFC) were reviewed. The operating principle of SOFC together with requirements from every part of SOFC was interpreted. After analyzing the development and problems of anode, cathode, electrolyte and interconnect material, the key problems for the application of solid oxide fuel cells were suggested.
2005, 34(8):1181-1185.
Abstract:
A brief overview of U film preparation methods is given. The methods primarily include mechanical polishing, electrolytic polishing, mechanical rolling, magnetron sputtering deposition, ion beam assisted deposition, and focused ion beam, their processes aiming at the preparation of fine U films are discussed. The post-treatment of U film against oxidation is also introduced briefly.
A brief overview of U film preparation methods is given. The methods primarily include mechanical polishing, electrolytic polishing, mechanical rolling, magnetron sputtering deposition, ion beam assisted deposition, and focused ion beam, their processes aiming at the preparation of fine U films are discussed. The post-treatment of U film against oxidation is also introduced briefly.
2005, 34(8):1186-1190.
Abstract:
The research for preparing YBCO coated conductor is being carried out in the world because of its significant application prospect. In this work, the process and recent development of the study on preparing YBCO coated conductor in the world by TFA-MOD method are reviewed. The synthesis of precursor solution, heat treatment after coating and the mechanism of forming YBCO superconducting layer were discussed as well.
The research for preparing YBCO coated conductor is being carried out in the world because of its significant application prospect. In this work, the process and recent development of the study on preparing YBCO coated conductor in the world by TFA-MOD method are reviewed. The synthesis of precursor solution, heat treatment after coating and the mechanism of forming YBCO superconducting layer were discussed as well.
2005, 34(8):1191-1195.
Abstract:
功能梯度材料是一种新型材料，其特点是组分、结构和物性参数都呈梯度变化。功能梯度材料的断裂分析属于非均匀材料断裂力学的范畴。结合最新的研究成果，从裂纹尖端渐近场、应力强度因子、断裂失效准则和动态断裂问题4个方面，全面阐述了功能梯度材料弹性断裂分析的研究方法、进展和卡要结论。特别是给出了类似于均匀材料Williams解的功能梯度材料裂纹尖端应力场，明确反映出了材料非均匀性对裂纹尖端应力场结构的影响。该解具有普遍的意义，可以作为功能梯度材料数值和实验方法（如边界配位法和高阶近似法）的基础。
功能梯度材料是一种新型材料，其特点是组分、结构和物性参数都呈梯度变化。功能梯度材料的断裂分析属于非均匀材料断裂力学的范畴。结合最新的研究成果，从裂纹尖端渐近场、应力强度因子、断裂失效准则和动态断裂问题4个方面，全面阐述了功能梯度材料弹性断裂分析的研究方法、进展和卡要结论。特别是给出了类似于均匀材料Williams解的功能梯度材料裂纹尖端应力场，明确反映出了材料非均匀性对裂纹尖端应力场结构的影响。该解具有普遍的意义，可以作为功能梯度材料数值和实验方法（如边界配位法和高阶近似法）的基础。
2005, 34(8):1196-1199.
Abstract:
In-situ TEM tension was used to observe the deformation of bulk pure Al and that constrained by bi-interface.The results show that cavity is joined with principal crack just after forming in front of crack tip in bulk Al.Different from bulk Al,however,more cavities will generate in front of the cavity in constrained Al sheet by bi-interface before main crack propagates,that is cavitations and blunting and sharpening of main crack coexist in tension process.Dislocations emitted from crack tip pile up more remarkably at the grain boundaries around crack tip with decrease of thickness of pure Al sheet resulting in obvious inerease of stress concentration,which leads to brittleness of pure Al sheet.
In-situ TEM tension was used to observe the deformation of bulk pure Al and that constrained by bi-interface.The results show that cavity is joined with principal crack just after forming in front of crack tip in bulk Al.Different from bulk Al,however,more cavities will generate in front of the cavity in constrained Al sheet by bi-interface before main crack propagates,that is cavitations and blunting and sharpening of main crack coexist in tension process.Dislocations emitted from crack tip pile up more remarkably at the grain boundaries around crack tip with decrease of thickness of pure Al sheet resulting in obvious inerease of stress concentration,which leads to brittleness of pure Al sheet.
2005, 34(8):1205-1208.
Abstract:
The precipitation process simulation of the medial density cubic alloy was conducted using the microscopic diffusion equation including the coherent strain energy, The results show that the coherent strain energy hinder the precipitation process of the alloy. With the increase of coherent strain energy, the arrangement orientation increase, from spherical-shaped precipitates to elliptical plate. With the increase of coherent strain energy, the precipitation mechanism of medial composition alloys near the high density alloys are changing from the mixture processes which possessed the characteristics of both non-classical nucleation growth and spinodal decomposition mechanisms to the processes which possessed only the characteristics of non-classical nucleation growth.
The precipitation process simulation of the medial density cubic alloy was conducted using the microscopic diffusion equation including the coherent strain energy, The results show that the coherent strain energy hinder the precipitation process of the alloy. With the increase of coherent strain energy, the arrangement orientation increase, from spherical-shaped precipitates to elliptical plate. With the increase of coherent strain energy, the precipitation mechanism of medial composition alloys near the high density alloys are changing from the mixture processes which possessed the characteristics of both non-classical nucleation growth and spinodal decomposition mechanisms to the processes which possessed only the characteristics of non-classical nucleation growth.
2005, 34(8):1209-1212.
Abstract:
Nanosized MCM-41 molecular sieve was prepared by using cetyltrimethylammonium bromide (CTMAB) and tetraethyl orthosilicate (TEOS) as the template and the silica source by means of hydrothermal method. The titanium-nano MCM-41 composite materials were prepared by impregnating the calcined nanoscale MCM-41 molecular sieve and using the tetrabutyl titanate as the titanium precusor. By means of powder X-ray diffraction, chemical analysis, nitrogen adsorption-desorption technique, infrared spectroscopy, the efficiency of the preparative method and the effect of it on the pore structure of nanometer MCM-41 molecular sieve were evaluated. The results show that titanium is incorporated into the MCM-41 molecular sieve. The silanol groups on the internal wall surfaces of MCM-41 are suggested to be the major sites for titanium incorporation. A part of titanium is in the channels of the molecular sieve. The prepared Ti-(nano MCM-41) materials keep the highly ordered mesoporous one-dimensional structure. The significant blue shift of the UV-vis diffusion reflectance absorption spectra of the Ti-(nano MCM-41) sample, compared to the spectrum of bluk TiO2, results from the encapsulation of titaniun dioxide particales in the channels of nanosized MCM-41 molecular sieve.
Nanosized MCM-41 molecular sieve was prepared by using cetyltrimethylammonium bromide (CTMAB) and tetraethyl orthosilicate (TEOS) as the template and the silica source by means of hydrothermal method. The titanium-nano MCM-41 composite materials were prepared by impregnating the calcined nanoscale MCM-41 molecular sieve and using the tetrabutyl titanate as the titanium precusor. By means of powder X-ray diffraction, chemical analysis, nitrogen adsorption-desorption technique, infrared spectroscopy, the efficiency of the preparative method and the effect of it on the pore structure of nanometer MCM-41 molecular sieve were evaluated. The results show that titanium is incorporated into the MCM-41 molecular sieve. The silanol groups on the internal wall surfaces of MCM-41 are suggested to be the major sites for titanium incorporation. A part of titanium is in the channels of the molecular sieve. The prepared Ti-(nano MCM-41) materials keep the highly ordered mesoporous one-dimensional structure. The significant blue shift of the UV-vis diffusion reflectance absorption spectra of the Ti-(nano MCM-41) sample, compared to the spectrum of bluk TiO2, results from the encapsulation of titaniun dioxide particales in the channels of nanosized MCM-41 molecular sieve.
9 Interface Shape and Preferred Orientation in the Directional Solidification Tb0.27Dy0.73Fe1.95 Alloy
2005, 34(8):1213-1216.
Abstract:
在自制的超高温度梯度定向凝固装置中,通过对Tb0.27Dy0.73Fe1.95合金定向凝固条件和固液界面形貌及晶体生长取向间的关系进行分析,发现Tb0.27Dy0.73Fe1.95合金定向凝固时发生胞枝转变的的凝固条件为GL/V值介于9.60×102K.s/mm2～10.45×102K·s/mm2之间.固液界面形貌与晶体取向间有明显的对应关系,固液界面形貌为胞状晶或无侧向分枝的树枝晶时其择优取向为〈110〉,结晶形貌为树枝晶时其择优生长方向为〈112〉,而在胞-枝转变区晶体为〈110〉,〈112〉,〈113〉等多种取向的混合.当Tb0.27Dy0.73Fe1.95合金以较低的晶体生长速率定向凝固时易产生〈110〉择优生长方向,并且产生〈110〉择优生长方向时的晶体生长速率范围随温度梯度的增加而扩大.
在自制的超高温度梯度定向凝固装置中,通过对Tb0.27Dy0.73Fe1.95合金定向凝固条件和固液界面形貌及晶体生长取向间的关系进行分析,发现Tb0.27Dy0.73Fe1.95合金定向凝固时发生胞枝转变的的凝固条件为GL/V值介于9.60×102K.s/mm2～10.45×102K·s/mm2之间.固液界面形貌与晶体取向间有明显的对应关系,固液界面形貌为胞状晶或无侧向分枝的树枝晶时其择优取向为〈110〉,结晶形貌为树枝晶时其择优生长方向为〈112〉,而在胞-枝转变区晶体为〈110〉,〈112〉,〈113〉等多种取向的混合.当Tb0.27Dy0.73Fe1.95合金以较低的晶体生长速率定向凝固时易产生〈110〉择优生长方向,并且产生〈110〉择优生长方向时的晶体生长速率范围随温度梯度的增加而扩大.
2005, 34(8):1217-1220.
Abstract:
The non-stoichiometric Ni50Mn27Ga23 polycrystalline ribbons were prepared by melt-spinning technique. The martensitic transformation and the magnetic-field-induced strain of melt-spun ribbons were investigated. The experimental results show that the ribbons still undergo thermal-elastic martensitic transformation and reverse transformation in cooling and heating process. The melt-spun ribbons exhibit typical thermo-elastic shape memory effect and larger strain than as-cast specimens, but martensitic transformation temperature decreases. The reason which makes melt-spun ribbons have larger martensitic-transformation-strain and magnetic-fieldinduced strain is that the particular internal stress induced by melt-spinning makes a texture form in the melt-spun ribbons. That the internal stress is released strongly by heat treatment results in a decrease of the magnetic-field-induced strain.
The non-stoichiometric Ni50Mn27Ga23 polycrystalline ribbons were prepared by melt-spinning technique. The martensitic transformation and the magnetic-field-induced strain of melt-spun ribbons were investigated. The experimental results show that the ribbons still undergo thermal-elastic martensitic transformation and reverse transformation in cooling and heating process. The melt-spun ribbons exhibit typical thermo-elastic shape memory effect and larger strain than as-cast specimens, but martensitic transformation temperature decreases. The reason which makes melt-spun ribbons have larger martensitic-transformation-strain and magnetic-fieldinduced strain is that the particular internal stress induced by melt-spinning makes a texture form in the melt-spun ribbons. That the internal stress is released strongly by heat treatment results in a decrease of the magnetic-field-induced strain.
2005, 34(8):1221-1225.
Abstract:
采用熔体旋甩法制备了快速凝固Al87Ni7Cu3Nd3金属玻璃薄带，并以等温加热和非等温加热方式处理试样。采用DSC，常规XRD和配骨SAED的高分辨率电镜等研究手段，着重研究了快速凝固Al87Ni7Cu3Nd3金属玻璃的初始品化行为。结果表明，快速凝固Al87Ni7Cu3Nd3金属玻璃的品化过程包括两个主要的相转变：α-Al品体从非晶基体中析出的初始晶化以及有Al3Ni，Al11Nd3和Al8Cu4Nd形成的第二次晶化过程；随着加热温度提高，保温时间延长，α—Al晶体相颗粒大小和相对含量均增大，增大速率呈现为先快后慢的变化规律：快速凝固Al87Ni7Cu3Nd3薄带初始品化的产物为α—Al晶体加残留非晶相的两相混合物，α-Al晶体纳米颗粒均匀弥散分布在非晶基体上，大多处于相互独立状态，且呈随机自由取向。
采用熔体旋甩法制备了快速凝固Al87Ni7Cu3Nd3金属玻璃薄带，并以等温加热和非等温加热方式处理试样。采用DSC，常规XRD和配骨SAED的高分辨率电镜等研究手段，着重研究了快速凝固Al87Ni7Cu3Nd3金属玻璃的初始品化行为。结果表明，快速凝固Al87Ni7Cu3Nd3金属玻璃的品化过程包括两个主要的相转变：α-Al品体从非晶基体中析出的初始晶化以及有Al3Ni，Al11Nd3和Al8Cu4Nd形成的第二次晶化过程；随着加热温度提高，保温时间延长，α—Al晶体相颗粒大小和相对含量均增大，增大速率呈现为先快后慢的变化规律：快速凝固Al87Ni7Cu3Nd3薄带初始品化的产物为α—Al晶体加残留非晶相的两相混合物，α-Al晶体纳米颗粒均匀弥散分布在非晶基体上，大多处于相互独立状态，且呈随机自由取向。
2005, 34(8):1226-1229.
Abstract:
采用固相烧结工艺制备了SrxBa1-xBi4Ti4O15铁电陶瓷和SrBi4Ti4O15／BaBi4Ti4O15铁电复合材料。在固相反应过程中，680℃时SrBi4Ti4O15或BaBi4Ti4O15开始生成：800℃时材料主晶相基本形成，但是还有微量焦绿石相存在；850℃时SrBi4Ti4O15或BaBi4Ti4O15的主要衍射峰全部出现。随着Ba含量的增加，SrxBa1-xBi4Ti4O15陶瓷的居里温度逐渐降低。Sr0.5Ba0.5Bi4Ti4O15，陶瓷的介电常数峰在高频时较宽，在100Hz时，介电常数峰被随温度升高而逐渐增大的介电常数所“屏蔽”，材料介电损耗随温度升高而增大，但在低频下增加得更快，这是高温下由氧空位引起的电子松弛极化造成的。将预烧后的SrBi4Ti4O15和BaBi4Ti4O15粉体分别造粒后冉均匀混合，压片成型，经烧结制得的SrBi4Ti4O15／BaBi4Ti4O15复合陶瓷其相变弥散特性明显优于SrxBa1-xBi4Ti4O15的相变弥散特性。
采用固相烧结工艺制备了SrxBa1-xBi4Ti4O15铁电陶瓷和SrBi4Ti4O15／BaBi4Ti4O15铁电复合材料。在固相反应过程中，680℃时SrBi4Ti4O15或BaBi4Ti4O15开始生成：800℃时材料主晶相基本形成，但是还有微量焦绿石相存在；850℃时SrBi4Ti4O15或BaBi4Ti4O15的主要衍射峰全部出现。随着Ba含量的增加，SrxBa1-xBi4Ti4O15陶瓷的居里温度逐渐降低。Sr0.5Ba0.5Bi4Ti4O15，陶瓷的介电常数峰在高频时较宽，在100Hz时，介电常数峰被随温度升高而逐渐增大的介电常数所“屏蔽”，材料介电损耗随温度升高而增大，但在低频下增加得更快，这是高温下由氧空位引起的电子松弛极化造成的。将预烧后的SrBi4Ti4O15和BaBi4Ti4O15粉体分别造粒后冉均匀混合，压片成型，经烧结制得的SrBi4Ti4O15／BaBi4Ti4O15复合陶瓷其相变弥散特性明显优于SrxBa1-xBi4Ti4O15的相变弥散特性。
2005, 34(8):1235-1238.
Abstract:
采用铜模铸造法制备出最大直径为2mm的Ti53Cu27Ni12Zr3Al7Si3B1块状非晶合金。DSC和DTA分析表明，该合金具有较高的玻璃形成能和热稳定性，玻璃转变温度（Tg），结晶化温度（Tx），过冷液体区间（△Tx）以及约化玻璃转变温度（Tg/Tm）分别为685K，754K，69K和0．62。由XRD分析结果可知，Ti53Cu27Ni12Zr3Al7Si3B1的晶化过程分为部分亚稳相析出、初生相（NiTi2，NiTi，δ-CuTi和CuTi2）析出以及稳定相（NiTi2，NiTi，CuTi3和一个新的未知相）析出3个阶段。用Kissinger法计算出3个阶段的表观晶化激活能分别为377．86kJ／mol，322．97kJ／mol和311．17kJ／mol。研究结果表明晶化过程中第1放热峰表观晶化激活能较大，能有效地阻止Ti53Cu27Ni12Zr3Al7Si3B1发生晶化，从而使其具有较大的非晶的玻璃形成能和良好的热稳定性。
采用铜模铸造法制备出最大直径为2mm的Ti53Cu27Ni12Zr3Al7Si3B1块状非晶合金。DSC和DTA分析表明，该合金具有较高的玻璃形成能和热稳定性，玻璃转变温度（Tg），结晶化温度（Tx），过冷液体区间（△Tx）以及约化玻璃转变温度（Tg/Tm）分别为685K，754K，69K和0．62。由XRD分析结果可知，Ti53Cu27Ni12Zr3Al7Si3B1的晶化过程分为部分亚稳相析出、初生相（NiTi2，NiTi，δ-CuTi和CuTi2）析出以及稳定相（NiTi2，NiTi，CuTi3和一个新的未知相）析出3个阶段。用Kissinger法计算出3个阶段的表观晶化激活能分别为377．86kJ／mol，322．97kJ／mol和311．17kJ／mol。研究结果表明晶化过程中第1放热峰表观晶化激活能较大，能有效地阻止Ti53Cu27Ni12Zr3Al7Si3B1发生晶化，从而使其具有较大的非晶的玻璃形成能和良好的热稳定性。
2005, 34(8):1239-1242.
Abstract:
The bending strength and fracture toughness of sintered NdFeB alloy are tested using a Zwick mechanical properties measure machine. The zero plastic energy in bending procedure shows the brittle characteristic of this kind of material. The Single-Edged-Notch-Bend (SENB) test for its fracture toughness also has the burden of polishing sample. So indentation microcracking is implemented as a simple evaluation method for the fracture toughness of sintered NdFeB alloy. In order to make the experiential parameters reliable in the relation of HV-KIC for Palmqvist crack system, HV and series indentation parameters such as P, a, l are measured to do the regression analysis of fracture toughness that is obtained by SENB test on a notched sample.
The bending strength and fracture toughness of sintered NdFeB alloy are tested using a Zwick mechanical properties measure machine. The zero plastic energy in bending procedure shows the brittle characteristic of this kind of material. The Single-Edged-Notch-Bend (SENB) test for its fracture toughness also has the burden of polishing sample. So indentation microcracking is implemented as a simple evaluation method for the fracture toughness of sintered NdFeB alloy. In order to make the experiential parameters reliable in the relation of HV-KIC for Palmqvist crack system, HV and series indentation parameters such as P, a, l are measured to do the regression analysis of fracture toughness that is obtained by SENB test on a notched sample.
2005, 34(8):1243-1246.
Abstract:
The monodisperse colloid silver with a 20 nm average diameter was prepared by UV-irradiation photochemical method. The kinetic characteristic on the reaction of Ag nanoparticles with cyanide was studied based on the surface plasma resonance (SPR) spectrum, and the mechanisms of molecule O2 participating in the reaction and the influence of OH- ions on the reaction were discussed. The coordination number of forming cyanocomplexes was also determined
The monodisperse colloid silver with a 20 nm average diameter was prepared by UV-irradiation photochemical method. The kinetic characteristic on the reaction of Ag nanoparticles with cyanide was studied based on the surface plasma resonance (SPR) spectrum, and the mechanisms of molecule O2 participating in the reaction and the influence of OH- ions on the reaction were discussed. The coordination number of forming cyanocomplexes was also determined
2005, 34(8):1247-1250.
Abstract:
通过温度、应变速率对95W-5（Ni／Fe／Co）合金流变应力曲线的影响，分析了该合金的变形特点。结果表明：该合金在200℃～600℃温度范围内变形时，初始加工硬化十分显著。宏观上表现为合金的屈服强度较高。95W-5（Ni／Fe／Co）合金在700℃～1300℃的流变应力曲线有一明显的特点就是曲线的斜率变小，而且出现短暂稳定态的流动。这是由于粘结相发牛动态回复的结果。此外该合金的高温塑性亦随应变速率的增大而增加。扫描电镜分析结果从微观上验证了该合金高温塑性变化的原因。
通过温度、应变速率对95W-5（Ni／Fe／Co）合金流变应力曲线的影响，分析了该合金的变形特点。结果表明：该合金在200℃～600℃温度范围内变形时，初始加工硬化十分显著。宏观上表现为合金的屈服强度较高。95W-5（Ni／Fe／Co）合金在700℃～1300℃的流变应力曲线有一明显的特点就是曲线的斜率变小，而且出现短暂稳定态的流动。这是由于粘结相发牛动态回复的结果。此外该合金的高温塑性亦随应变速率的增大而增加。扫描电镜分析结果从微观上验证了该合金高温塑性变化的原因。
2005, 34(8):1251-1254.
Abstract:
研究了磁粉粒度、取向磁场强度、取向时间及装载量对注射成形各向异性粘结NdFeB磁体性能的影响，并分析了其原因。结果表明：NdFeB磁粉粒径太粉末或太细均不利于磁体性能的提高，其最佳粒径范围是60μm～100μm；随着取向磁场强度的逐渐增加，磁体剩磁Br及矫顽力bHc增加较大但其内禀矫顽固力jHc则基本不变；与此同时为保证磁粉取向完全，磁场取向时间必须大于5g。在此基础上，通过实验找出了最佳的装载量并制备出最大磁能积（BH）max和抗压强度σb分别为99kJ/m^3及125MPa的高性能注射成形各向异性粘结NdFeB磁体。
研究了磁粉粒度、取向磁场强度、取向时间及装载量对注射成形各向异性粘结NdFeB磁体性能的影响，并分析了其原因。结果表明：NdFeB磁粉粒径太粉末或太细均不利于磁体性能的提高，其最佳粒径范围是60μm～100μm；随着取向磁场强度的逐渐增加，磁体剩磁Br及矫顽力bHc增加较大但其内禀矫顽固力jHc则基本不变；与此同时为保证磁粉取向完全，磁场取向时间必须大于5g。在此基础上，通过实验找出了最佳的装载量并制备出最大磁能积（BH）max和抗压强度σb分别为99kJ/m^3及125MPa的高性能注射成形各向异性粘结NdFeB磁体。
2005, 34(8):1255-1258.
Abstract:
采用溶胶一凝胶法制备了CaAl2O4：Eu^2＋，Nd^3＋纳米粉体发光材料。样品的XRD和SEM分析结果表明：800℃已形成CaAl2O4晶相；样品颗粒尺寸随灼烧温度升高而增加，平均粒径约为20nm～40nm。光谱分析表明：样品的激发光谱为240nm～400nm的宽带谱，在256．6nm和330．6nm处有激发峰。发光光谱是386nm～500nm的宽带谱，峰值位于440nm，与CaAl2O4：Eu^2＋，Nd^3＋粗晶材料相比，光谱发生了“蓝移”现象。样品的热释光峰值位于206℃，与粗晶材料相比，峰值向高温移动了96℃，热释发光峰曲线形状也变宽。样品的发光衰减是由初始的快衰减和随后的慢衰减构成，余辉时间为5h。
采用溶胶一凝胶法制备了CaAl2O4：Eu^2＋，Nd^3＋纳米粉体发光材料。样品的XRD和SEM分析结果表明：800℃已形成CaAl2O4晶相；样品颗粒尺寸随灼烧温度升高而增加，平均粒径约为20nm～40nm。光谱分析表明：样品的激发光谱为240nm～400nm的宽带谱，在256．6nm和330．6nm处有激发峰。发光光谱是386nm～500nm的宽带谱，峰值位于440nm，与CaAl2O4：Eu^2＋，Nd^3＋粗晶材料相比，光谱发生了“蓝移”现象。样品的热释光峰值位于206℃，与粗晶材料相比，峰值向高温移动了96℃，热释发光峰曲线形状也变宽。样品的发光衰减是由初始的快衰减和随后的慢衰减构成，余辉时间为5h。
2005, 34(8):1259-1262.
Abstract:
The GMI effect of composite amorphous wire consisting of Ag core and outer NiFe shell was investigated. GMI effect can be observed at low frequency. The expression of the impedance is deduced when the applied field is lower than the anisotropy field. The influence of parameters on GMI effect was theoretically analyzed. It is found that the GMI effect is strongly dependent on the thickness of ferromagnetic layer. And the GMI effect increase considerably when the conductivity of the inner core is much larger than that of the shell.
The GMI effect of composite amorphous wire consisting of Ag core and outer NiFe shell was investigated. GMI effect can be observed at low frequency. The expression of the impedance is deduced when the applied field is lower than the anisotropy field. The influence of parameters on GMI effect was theoretically analyzed. It is found that the GMI effect is strongly dependent on the thickness of ferromagnetic layer. And the GMI effect increase considerably when the conductivity of the inner core is much larger than that of the shell.
2005, 34(8):1263-1266.
Abstract:
The paper introduced microstructure, transition mechanism, shape memory effect of ferromagnetic NiMnGa system, and systematically examined external characteristic of NiMnGa magnetic shape memory alloy. The static relationships of magnetic field, temperature, pre-pressure, strain of NiMnGa were obtained. After drawing the dynamic curves of different temperature and pre-pressure, the characteristic features of NiMnGa dynamic strain and static strain were given. The experimental results confirm that with the increase of magnetic field and decrease of pre-pressure, the strain inerease. When the temperature close to austensite temperature, the strain is the largest. Therefore, the results provide a theoretical and experimental basis for practical application of NiMnGa alloy.
The paper introduced microstructure, transition mechanism, shape memory effect of ferromagnetic NiMnGa system, and systematically examined external characteristic of NiMnGa magnetic shape memory alloy. The static relationships of magnetic field, temperature, pre-pressure, strain of NiMnGa were obtained. After drawing the dynamic curves of different temperature and pre-pressure, the characteristic features of NiMnGa dynamic strain and static strain were given. The experimental results confirm that with the increase of magnetic field and decrease of pre-pressure, the strain inerease. When the temperature close to austensite temperature, the strain is the largest. Therefore, the results provide a theoretical and experimental basis for practical application of NiMnGa alloy.
2005, 34(8):1267-1270.
Abstract:
利用MoSi2，Al，C之间的原位反应无压烧结制备了Mo（Si1-x，Alx）2-SiC复合材料。随着烧结温度从1400℃升高到1650℃，MoSi2相消失，反应产物为Mo（Si，Al）2和SiC及Mo5Si3C相。由于固溶体及Nowotny（Mo5Si3C）相的形成，使得原位反应中化学计量法则变得困难。原位生成的SiC相随着温度的升高由颗粒状变为晶须状，并由于它的强韧化作用使得复相材料的性能较单相材料成倍提高。
利用MoSi2，Al，C之间的原位反应无压烧结制备了Mo（Si1-x，Alx）2-SiC复合材料。随着烧结温度从1400℃升高到1650℃，MoSi2相消失，反应产物为Mo（Si，Al）2和SiC及Mo5Si3C相。由于固溶体及Nowotny（Mo5Si3C）相的形成，使得原位反应中化学计量法则变得困难。原位生成的SiC相随着温度的升高由颗粒状变为晶须状，并由于它的强韧化作用使得复相材料的性能较单相材料成倍提高。
2005, 34(8):1271-1274.
Abstract:
研究了三元复相合金Cu-20Ni-30Cr（at%）在700℃和800℃纯氧气中的氧化行为，合金由三相组成，具有最大Cu浓度和最小Cr浓度的α相为合金的基体，中间浓度的Ni和Cr的β相和富Cr的γ相以颗粒状态分布在合金基体中。合金在2个温度下的氧化动力学曲线偏离抛物线规律，其氧化增重随时间延长而降低，合金氧化速率随温度升高而加快，合金形成了复杂的氧化膜结构，外层为富Cu氧化物，中间层为尖晶石层，最内层为不规则但连续的Cr2O3膜，合金中的复相组织限制Cr在合金中的扩散，抑制了外氧化膜的形成。
研究了三元复相合金Cu-20Ni-30Cr（at%）在700℃和800℃纯氧气中的氧化行为，合金由三相组成，具有最大Cu浓度和最小Cr浓度的α相为合金的基体，中间浓度的Ni和Cr的β相和富Cr的γ相以颗粒状态分布在合金基体中。合金在2个温度下的氧化动力学曲线偏离抛物线规律，其氧化增重随时间延长而降低，合金氧化速率随温度升高而加快，合金形成了复杂的氧化膜结构，外层为富Cu氧化物，中间层为尖晶石层，最内层为不规则但连续的Cr2O3膜，合金中的复相组织限制Cr在合金中的扩散，抑制了外氧化膜的形成。
2005, 34(8):1279-1282.
Abstract:
采用机械合金化(MA)法和低温高压快速烧结工艺制备了Fe84Nb4W3B9软磁合金粉末及其块体合金,并研究了粉末的晶粒尺寸、热稳定性和块体合金的相组成,晶粒大小以及相对密度与烧结条件的关系.结果表明(1)MA60h后,可获得单相α-Fe纳米晶(8.6nm)过饱和固溶体粉末(2)在MA粉末DSC升温曲线中,分别出现3个强弱不一的放热峰,依次发生了畸变的纳米晶过饱和固溶体的结构弛豫、纳米晶粒长大以及固溶体的相分解过程;(3)在P=5.5GPa,t=3min的烧结条件下,当Pw≥980W后,可获得相对密度98.2%以上、单相α-Fe纳米晶(20.3nm)块体合金,其磁性能为比饱和磁化强度Ms=154.0emu·g-1,矫顽力Hc=7.474×103A·m-1.
采用机械合金化(MA)法和低温高压快速烧结工艺制备了Fe84Nb4W3B9软磁合金粉末及其块体合金,并研究了粉末的晶粒尺寸、热稳定性和块体合金的相组成,晶粒大小以及相对密度与烧结条件的关系.结果表明(1)MA60h后,可获得单相α-Fe纳米晶(8.6nm)过饱和固溶体粉末(2)在MA粉末DSC升温曲线中,分别出现3个强弱不一的放热峰,依次发生了畸变的纳米晶过饱和固溶体的结构弛豫、纳米晶粒长大以及固溶体的相分解过程;(3)在P=5.5GPa,t=3min的烧结条件下,当Pw≥980W后,可获得相对密度98.2%以上、单相α-Fe纳米晶(20.3nm)块体合金,其磁性能为比饱和磁化强度Ms=154.0emu·g-1,矫顽力Hc=7.474×103A·m-1.
2005, 34(8):1283-1286.
Abstract:
Nanocrystalline WC-6Co composite powder that was produced by spray thermal decomposition-continuous and carbonizatio technology was used as raw material, and this paper adopted spark plasma sintering technology to prepare ultrafine cemented carbide. Th microstructure, grain size, porosity, Vickers hardeness, density and Rockwell a hardness (HRA), transverse rupture strength (TRS magnetic saturation induction and magnetic coercivity were studied. The results show that grain of specimen that was prepared by spar plasma sintering technology is 150 nm~300 nm, transverse rupture strength (TRS) is more than 2800 MPa, and Vickers hardness o specimen is more than 19 500 MPa. Ultrafine cemented carbide with high strength and high hardness is obtained.
Nanocrystalline WC-6Co composite powder that was produced by spray thermal decomposition-continuous and carbonizatio technology was used as raw material, and this paper adopted spark plasma sintering technology to prepare ultrafine cemented carbide. Th microstructure, grain size, porosity, Vickers hardeness, density and Rockwell a hardness (HRA), transverse rupture strength (TRS magnetic saturation induction and magnetic coercivity were studied. The results show that grain of specimen that was prepared by spar plasma sintering technology is 150 nm~300 nm, transverse rupture strength (TRS) is more than 2800 MPa, and Vickers hardness o specimen is more than 19 500 MPa. Ultrafine cemented carbide with high strength and high hardness is obtained.
2005, 34(8):1287-1290.
Abstract:
The effects of potassium and rare earth (RE) on the mechanical properties and thermal physical properties of Fe-V-W-Mo alloy were researched. The results show that the hardness and hot hardness of modified Fe-V-W-Mo alloy slightly increase, impact toughness greatly increase by 41.82% and reach to 11.09 J/cm2. K-RE modification is able to increase the wear resistance and heat conductivity coefficient and decrease heat expansion coefficient. The mechanism that K-RE improved the properties of Fe-V-W-Mo alloy was analysed. Fe-V-W-Mo alloy roll modified by K-RE was manufactured by means of common centrifugal casting method, its service effect was very excellent in hot rolling steel.
The effects of potassium and rare earth (RE) on the mechanical properties and thermal physical properties of Fe-V-W-Mo alloy were researched. The results show that the hardness and hot hardness of modified Fe-V-W-Mo alloy slightly increase, impact toughness greatly increase by 41.82% and reach to 11.09 J/cm2. K-RE modification is able to increase the wear resistance and heat conductivity coefficient and decrease heat expansion coefficient. The mechanism that K-RE improved the properties of Fe-V-W-Mo alloy was analysed. Fe-V-W-Mo alloy roll modified by K-RE was manufactured by means of common centrifugal casting method, its service effect was very excellent in hot rolling steel.
2005, 34(8):1291-1294.
Abstract:
Graphit-ic and Dymon-ic coatings were deposited by closed field unbalanced magnetron ion plating. The microstructure, morphology, microhardness and tribological properties of the coatings were investigated by means of scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), transmission electron microscopy (TEM), nano-indentation, friction and wear testing. The results show that Graphit-ic and Dymon-ic coatings are dense and smooth. The structure of two coatings is all amorphous. The microhardness of Graphit-ic is lower than Dymon-ic coating. They show a good friction-reducing and a antiwear behavior in sliding against GCr-5 steel. The friction coefficient of Graphit-ic is lower than Dymon-ic, hence, the wear rate of Graphit-ic is higher than Dymon-ic.
Graphit-ic and Dymon-ic coatings were deposited by closed field unbalanced magnetron ion plating. The microstructure, morphology, microhardness and tribological properties of the coatings were investigated by means of scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), transmission electron microscopy (TEM), nano-indentation, friction and wear testing. The results show that Graphit-ic and Dymon-ic coatings are dense and smooth. The structure of two coatings is all amorphous. The microhardness of Graphit-ic is lower than Dymon-ic coating. They show a good friction-reducing and a antiwear behavior in sliding against GCr-5 steel. The friction coefficient of Graphit-ic is lower than Dymon-ic, hence, the wear rate of Graphit-ic is higher than Dymon-ic.
2005, 34(8):1295-1298.
Abstract:
The influence of Cobalt, Tungsten, and Titanium on stress-rupture properties of Nickel-base single crystal superalloy has been investigated using orthogonal arrays experimental design. The compositions of alloy have been optimized by mathematical analysis. The results show that Ti content has the most important influence on persistent lives and it is followed by Co, W in the effects. The persistent life is long when the alloy contains 10wt%Co, 8wt%W and 0wt%Ti. This alloy also has high microstructure stability after long-term ageing.
The influence of Cobalt, Tungsten, and Titanium on stress-rupture properties of Nickel-base single crystal superalloy has been investigated using orthogonal arrays experimental design. The compositions of alloy have been optimized by mathematical analysis. The results show that Ti content has the most important influence on persistent lives and it is followed by Co, W in the effects. The persistent life is long when the alloy contains 10wt%Co, 8wt%W and 0wt%Ti. This alloy also has high microstructure stability after long-term ageing.
2005, 34(8):1299-1301.
Abstract:
Ce0.6Zr0.3Pr0.1O2 solid solution was prepared by co-precipitation technique and characterized by XRD, FT-Raman spectra, and SEM. Palladium-only three-way catalysts containing Ce0.6Zr0.3Pr0.1O2 as well as CeO2 was also prepared and evaluated under the condition of simulated exhaust in the lab. The results show that Ce0.6Zr0.3Pr0.1O2 has cubic fluorite solid solution structure that is stable at higher temperature. Compared with Pd/CeO2, Pd/Ce0.6Zr0.3Pr0.1O2 possesses wider air/fuel ratio operating window and lower light-off temperature.
Ce0.6Zr0.3Pr0.1O2 solid solution was prepared by co-precipitation technique and characterized by XRD, FT-Raman spectra, and SEM. Palladium-only three-way catalysts containing Ce0.6Zr0.3Pr0.1O2 as well as CeO2 was also prepared and evaluated under the condition of simulated exhaust in the lab. The results show that Ce0.6Zr0.3Pr0.1O2 has cubic fluorite solid solution structure that is stable at higher temperature. Compared with Pd/CeO2, Pd/Ce0.6Zr0.3Pr0.1O2 possesses wider air/fuel ratio operating window and lower light-off temperature.
2005, 34(8):1302-1305.
Abstract:
The microstructure and tensile properties of Co40NiCrMo cobalt-base elastic alloy were investigated.The results show that fce structure is the crystal structure of Co40NiCrMo alloy after heat treatment and hard-drawn.The dislocation slip and twinning are the modes of plastic deformation during the hard-drawn.Twinning is the main deformation mode of Co40NiCrMo alloy after hard-drawn when more deformation is made.
The microstructure and tensile properties of Co40NiCrMo cobalt-base elastic alloy were investigated.The results show that fce structure is the crystal structure of Co40NiCrMo alloy after heat treatment and hard-drawn.The dislocation slip and twinning are the modes of plastic deformation during the hard-drawn.Twinning is the main deformation mode of Co40NiCrMo alloy after hard-drawn when more deformation is made.
2005, 34(8):1306-1309.
Abstract:
Niobium is an excellent material used for production of electrolytic capacitor, but when amorphous Nb2O5 dielectric film grows during electrolysis reaction meanwhile two kinds of low valence niobium oxide (NbO2 and NbO) forms, the presence of NbO2 and NbO has bad influence on the performances of niobium capacitor. In this work, through comparative experiments of amorphous film growth condition and analysis on the growth mechanism, the relative contents of three kinds of Nb oxides are well controlled, and performance of Nb capacitor samples has been improved greatly.
Niobium is an excellent material used for production of electrolytic capacitor, but when amorphous Nb2O5 dielectric film grows during electrolysis reaction meanwhile two kinds of low valence niobium oxide (NbO2 and NbO) forms, the presence of NbO2 and NbO has bad influence on the performances of niobium capacitor. In this work, through comparative experiments of amorphous film growth condition and analysis on the growth mechanism, the relative contents of three kinds of Nb oxides are well controlled, and performance of Nb capacitor samples has been improved greatly.
2005, 34(8):1310-1313.
Abstract:
将组合材料芯片技术中梯度组合法应用于新型发光材料Gd1-xAlO3：Eux^3＋（发光峰丰峰位置为615nm，对应Eu^5D0→^7F2电子跃迁）的激活剂掺杂晕优化。获得如下的研究结果：在紫外激发T（254nm）Gd1-xAlO3：Eux^3＋材料中的x值为0．09；Pr共掺杂时会降低发光强度（n（Pr）：n（Eu）〈1：10）。光谱分析表明：Pr，Eu间卢子支持的共振能量传递，是Pr降低Gd1-xAlO3：Eux^3＋（简写为：GAP：Eu）发光强度的丰要原因。优化的结果与柠檬酸盐硝酸盐溶胶凝胶法制备粉体掺杂萤优化实验结果一致。实验结果表明组合法在发光材料开发中具有高效性。
将组合材料芯片技术中梯度组合法应用于新型发光材料Gd1-xAlO3：Eux^3＋（发光峰丰峰位置为615nm，对应Eu^5D0→^7F2电子跃迁）的激活剂掺杂晕优化。获得如下的研究结果：在紫外激发T（254nm）Gd1-xAlO3：Eux^3＋材料中的x值为0．09；Pr共掺杂时会降低发光强度（n（Pr）：n（Eu）〈1：10）。光谱分析表明：Pr，Eu间卢子支持的共振能量传递，是Pr降低Gd1-xAlO3：Eux^3＋（简写为：GAP：Eu）发光强度的丰要原因。优化的结果与柠檬酸盐硝酸盐溶胶凝胶法制备粉体掺杂萤优化实验结果一致。实验结果表明组合法在发光材料开发中具有高效性。
2005, 34(8):1314-1317.
Abstract:
The microstructure and phase composition of Gd5Si2Ge2 alloy obtained by arc-melting and melt spinning processes were studied The results show that the arc-melted Gd5Si2Ge2 samples with different mass had different microstructure and phase composition. The Gd5Si2Ge2 alloys melt-spun under the velocity less than 40 m/s crystallize in the Gd5Si2Ge2-type structure; and the sample under the velocity of 50 m/s consists of Gd5Si2Ge2-type and Gd5Si4-type phases. The effect of solidification rates on the microstructure and phase composition were identified.
The microstructure and phase composition of Gd5Si2Ge2 alloy obtained by arc-melting and melt spinning processes were studied The results show that the arc-melted Gd5Si2Ge2 samples with different mass had different microstructure and phase composition. The Gd5Si2Ge2 alloys melt-spun under the velocity less than 40 m/s crystallize in the Gd5Si2Ge2-type structure; and the sample under the velocity of 50 m/s consists of Gd5Si2Ge2-type and Gd5Si4-type phases. The effect of solidification rates on the microstructure and phase composition were identified.
33 Improvement on Surface Properties of Titanium Alloy by Plasma Immersion Ion Implantation Technique
2005, 34(8):1318-1321.
Abstract:
研究了等离子体浸没离子注入（PIII）技术对Ti6A14V合金表面性能的影响。分析比较了灯丝放电PIII和射频辉光放电PIII对基体表面进行氮离子注入后的改性效果。应用X射线衍射仪（XRD），扫描电镜（SEM）分析了注入层的相组成和组织结构：测试了经不同PIII工艺参数处理后试样的显微硬度和摩擦磨损性能。结果表明：氮离子注入使Ti6A14V的粗大晶粒（α-β相）转变为细小致密的晶粒，表面层中形成了耐磨相TiN；处理后试样表面的显微硬度提高了80％，摩擦系数降到0．16，抗磨损性能得到了显著提高。
研究了等离子体浸没离子注入（PIII）技术对Ti6A14V合金表面性能的影响。分析比较了灯丝放电PIII和射频辉光放电PIII对基体表面进行氮离子注入后的改性效果。应用X射线衍射仪（XRD），扫描电镜（SEM）分析了注入层的相组成和组织结构：测试了经不同PIII工艺参数处理后试样的显微硬度和摩擦磨损性能。结果表明：氮离子注入使Ti6A14V的粗大晶粒（α-β相）转变为细小致密的晶粒，表面层中形成了耐磨相TiN；处理后试样表面的显微硬度提高了80％，摩擦系数降到0．16，抗磨损性能得到了显著提高。
2005, 34(8):1322-1325.
Abstract:
The effect of Ag, Mg on microstructure and ageing characteristics of Al-Cu-L(i2197)alloy has been studied. Independent small addition of Ag to the alloy enhances peakaging strength to a larger extent and the different aging-strengthening effect is accompanied by the different concentration of Ag. 2197 alloy has the largest solution-strengthening effect and the strongest aging response and aging- strengthening effect by the combined addition of Ag and Mg. Independent and combined roles of small addition Ag and Mg can be interpreted in terms of the solute-vacance interaction and solute-solute atom interaction.
The effect of Ag, Mg on microstructure and ageing characteristics of Al-Cu-L(i2197)alloy has been studied. Independent small addition of Ag to the alloy enhances peakaging strength to a larger extent and the different aging-strengthening effect is accompanied by the different concentration of Ag. 2197 alloy has the largest solution-strengthening effect and the strongest aging response and aging- strengthening effect by the combined addition of Ag and Mg. Independent and combined roles of small addition Ag and Mg can be interpreted in terms of the solute-vacance interaction and solute-solute atom interaction.
2005, 34(8):1326-1329.
Abstract:
Five kinds of bonded magnets with the compositions (at%) of Nd10.5Fe78.4-xCo5ZrxB6.1 (x= 0, 1.0, 1.5, 2.0, 2.5) were prepared by melt-spinning, post heat treatment and mould pressing. The microstructure and crystallization behavior was studied by X-ray diffraction (XRD), differential thermal analysis (DTA) and transmission electron microscopy (TEM). The results suggest that high Zr concentration can increase the glass formation ability (GFA) of alloys. The Fe2Zr with high melting point forms in the alloys, when the content of Zr is controlled at a certain amount, and it can reduce the grain size. The coercivity and the squareness of demagnetization loop are obviously improved by the addition of Zr, and the energy product is accordingly increased. As a result, the excellent magnetic properties with Br= 0.659 T, Hcj=628 kA/m, Hcb=419 kA/m, (BH)m=73 kJ/m3 are obtained in Nd10.5Fe78.4-xCo5ZrxB6.1 bonded magnet with x=2.
Five kinds of bonded magnets with the compositions (at%) of Nd10.5Fe78.4-xCo5ZrxB6.1 (x= 0, 1.0, 1.5, 2.0, 2.5) were prepared by melt-spinning, post heat treatment and mould pressing. The microstructure and crystallization behavior was studied by X-ray diffraction (XRD), differential thermal analysis (DTA) and transmission electron microscopy (TEM). The results suggest that high Zr concentration can increase the glass formation ability (GFA) of alloys. The Fe2Zr with high melting point forms in the alloys, when the content of Zr is controlled at a certain amount, and it can reduce the grain size. The coercivity and the squareness of demagnetization loop are obviously improved by the addition of Zr, and the energy product is accordingly increased. As a result, the excellent magnetic properties with Br= 0.659 T, Hcj=628 kA/m, Hcb=419 kA/m, (BH)m=73 kJ/m3 are obtained in Nd10.5Fe78.4-xCo5ZrxB6.1 bonded magnet with x=2.
2005, 34(8):1330-1333.
Abstract:
采用交流微弧氧化方法，在硅酸盐溶液中于锆合金表面沉积了一层厚约28μm的氧化膜。用扫描电镜（SEM），能谱（EDS）及X射线衍射（XRD）分析了氧化膜的组织形貌、元素分布及相组成。通过测量试样在5％NaCl溶液中的点腐蚀电位，评估了氧化膜的保护性能。研究结果表明：氧化膜自内而外分为3层，即过渡层，致密层和疏松层。疏松层厚度达18μm，与致密层的界面存在明显孔洞，因此结合性较差；过渡层和基体、致密层与过渡层之间结合牢固。Si元素存在于氧化膜中，这说明电解液中的SiO3^2-参与了微弧氧化反应。氧化膜主要由M-ZrO2相和T-ZrO2相组成。锆合金表面的微弧氧化膜具有良好的耐蚀性能。
采用交流微弧氧化方法，在硅酸盐溶液中于锆合金表面沉积了一层厚约28μm的氧化膜。用扫描电镜（SEM），能谱（EDS）及X射线衍射（XRD）分析了氧化膜的组织形貌、元素分布及相组成。通过测量试样在5％NaCl溶液中的点腐蚀电位，评估了氧化膜的保护性能。研究结果表明：氧化膜自内而外分为3层，即过渡层，致密层和疏松层。疏松层厚度达18μm，与致密层的界面存在明显孔洞，因此结合性较差；过渡层和基体、致密层与过渡层之间结合牢固。Si元素存在于氧化膜中，这说明电解液中的SiO3^2-参与了微弧氧化反应。氧化膜主要由M-ZrO2相和T-ZrO2相组成。锆合金表面的微弧氧化膜具有良好的耐蚀性能。
2005, 34(8):1334-1337.
Abstract:
测试了Ti600高温钛合金板材在不同加工及热处理状态下的室温托伸及高温蠕变性能，分析对比了热机械处理工艺TMP（thermomechanical process）对合金板材组织性能的影响规律与内在机制；另外还研究了Ti600合金板材焊接后热处理工艺对组纵性能的影响。结果表明：采用热机械处理工艺（TMP）可获得充分生长的片层状团束组织（colony structure），这种类州的组织显著提高了合金的高温蠕变抗力；板材焊接后应选择β区固溶热处理，以获得良好的室温与高温性能。
测试了Ti600高温钛合金板材在不同加工及热处理状态下的室温托伸及高温蠕变性能，分析对比了热机械处理工艺TMP（thermomechanical process）对合金板材组织性能的影响规律与内在机制；另外还研究了Ti600合金板材焊接后热处理工艺对组纵性能的影响。结果表明：采用热机械处理工艺（TMP）可获得充分生长的片层状团束组织（colony structure），这种类州的组织显著提高了合金的高温蠕变抗力；板材焊接后应选择β区固溶热处理，以获得良好的室温与高温性能。
38 Effect of Solution Heat Treatment Parameters on the Grain Growth in Cold-Deformed Inconel718 Alloy
2005, 34(8):1338-1340.
Abstract:
研究了固溶温度和保温时间对冷变形Inconel718合金晶粒长大的影响。住980℃～1000℃固溶处理时，晶粒长大缓慢，品粒长大动力学指数为0.122～0．181，指数随固溶温度升高而增加。住980℃固溶处珲时，保温时间不超过60min，可以得到细小的混品组织：住990℃～1090℃固溶处理时，保温时间30min，晶粒均匀长大，晶粒均匀长大的表观激活能Q-176kJ／mol，晶粒长大是通过品界空位扩散的品界迁移机制。保温时间60min，在990℃～1030℃温度区间，晶粒长大不显著，当温度超过1030℃，晶粒明显粗化。
研究了固溶温度和保温时间对冷变形Inconel718合金晶粒长大的影响。住980℃～1000℃固溶处理时，晶粒长大缓慢，品粒长大动力学指数为0.122～0．181，指数随固溶温度升高而增加。住980℃固溶处珲时，保温时间不超过60min，可以得到细小的混品组织：住990℃～1090℃固溶处理时，保温时间30min，晶粒均匀长大，晶粒均匀长大的表观激活能Q-176kJ／mol，晶粒长大是通过品界空位扩散的品界迁移机制。保温时间60min，在990℃～1030℃温度区间，晶粒长大不显著，当温度超过1030℃，晶粒明显粗化。
2005, 34(8):1341-1344.
Abstract:
采用电弧离子镀设备，以高纯Fe靶和Pd靶为原料，在TA1工业纯钛表面先后沉积Fe，Pd2层单金属薄膜。对样品分别进行700℃～1100℃，保温0．5h～3h的真空退火处理，使Fe膜和Pd膜之间形成扩散层，制备FePd磁性膜。重点研究了Fe，Pd及钛衬底之间的百扩散机制，膜层结构，薄膜的相组成。结果表明：在700℃，0．5h处理后FePd薄膜的合金化较好：在900℃，1h处理后虽有FePd相形成，但基体中的Ti已经扩散至表面：温度高于900℃且保温时间长于1h处理，不利于FePd膜的形成。
采用电弧离子镀设备，以高纯Fe靶和Pd靶为原料，在TA1工业纯钛表面先后沉积Fe，Pd2层单金属薄膜。对样品分别进行700℃～1100℃，保温0．5h～3h的真空退火处理，使Fe膜和Pd膜之间形成扩散层，制备FePd磁性膜。重点研究了Fe，Pd及钛衬底之间的百扩散机制，膜层结构，薄膜的相组成。结果表明：在700℃，0．5h处理后FePd薄膜的合金化较好：在900℃，1h处理后虽有FePd相形成，但基体中的Ti已经扩散至表面：温度高于900℃且保温时间长于1h处理，不利于FePd膜的形成。
