Most cited articles
Tang Huiping Northwest Institute for Nonferrous Metal Research
,
P O Box
,
Xi''''an Shaanxi
,
P R China Zhang Zhengde
1997(1):1-6.
Abstract:
The status of research, production and application of porous metal materials is introduced It is pointed out that the development of porous metal materials should be industrialization on a large scale, and the precision grade of products should be seriation
The status of research, production and application of porous metal materials is introduced It is pointed out that the development of porous metal materials should be industrialization on a large scale, and the precision grade of products should be seriation
2004, 33(6):561-565.
Abstract:
The research and development of heat resistant Mg alloys were reviewed and alloying these alloys was mentioned as the basic method improving the properties as well as Cu, Ca, Sc and Sr, rare-earth elements. Alloying, extrusion and semi-solid process were highlighted to introduce the sliping of prismatic plane (1010) and pyramidal plane (1011) which can benefit the mechanical properties. Superplastic process was the effective method to fabricate the heat resistant Mg alloys parts.
The research and development of heat resistant Mg alloys were reviewed and alloying these alloys was mentioned as the basic method improving the properties as well as Cu, Ca, Sc and Sr, rare-earth elements. Alloying, extrusion and semi-solid process were highlighted to introduce the sliping of prismatic plane (1010) and pyramidal plane (1011) which can benefit the mechanical properties. Superplastic process was the effective method to fabricate the heat resistant Mg alloys parts.
1997(2):1-7.
Abstract:
系统介绍了钛基复合材料的最新研究和发展，涉及非连续颗粒增强和连续纤维增强两大类钛基复合材料近１０多年来的研究成果和发展趋势；重点评述了钛基材和增强剂的选择，增强剂与基体界面反应的研究，扩散障碍涂层技术和钛基复合材料制造工艺的研究和发展，讨论了钛基复合材料的应用前景。
系统介绍了钛基复合材料的最新研究和发展，涉及非连续颗粒增强和连续纤维增强两大类钛基复合材料近１０多年来的研究成果和发展趋势；重点评述了钛基材和增强剂的选择，增强剂与基体界面反应的研究，扩散障碍涂层技术和钛基复合材料制造工艺的研究和发展，讨论了钛基复合材料的应用前景。
2002(4):312-314.
Abstract:
Nanocrystalline CeO2 was prepared by hydrothermal crystallization method. XRD analysis indicates that the structure of the synthesized CeO2 is cubic with space group O5H FM3M. TEM photos reveals that nanocrystalline CeO2 is spherical in shape with a mean particle size of less than 100 nm. It was found that with increase of hydrothermal treatment temperatures the relative density of CeO2 nanocrystalline increased.
Nanocrystalline CeO2 was prepared by hydrothermal crystallization method. XRD analysis indicates that the structure of the synthesized CeO2 is cubic with space group O5H FM3M. TEM photos reveals that nanocrystalline CeO2 is spherical in shape with a mean particle size of less than 100 nm. It was found that with increase of hydrothermal treatment temperatures the relative density of CeO2 nanocrystalline increased.
Xi Zhengping
,
Zhou Lian
,
Li Jian
,
Liao Jichang
,
Wu Lujian
,
Li Yalu
,
Li Jianping
,
Zhang Yanrong
1998(6):317-321.
Abstract:
The current status of development, fundamental characteristics, and applications of metal fibres are discussed. It is found that many new types of material have been developed by using metal fibres,and that these materials have direct impact on the human daily life. Progress in metal fibre research and fibre products in China are described. China has a considerable competitive advantage in research and development of metal fibres and fibre products. There is a fairly good technical bases for predicting significant advances in the industrialization of metal fibres and fibre products in China.
The current status of development, fundamental characteristics, and applications of metal fibres are discussed. It is found that many new types of material have been developed by using metal fibres,and that these materials have direct impact on the human daily life. Progress in metal fibre research and fibre products in China are described. China has a considerable competitive advantage in research and development of metal fibres and fibre products. There is a fairly good technical bases for predicting significant advances in the industrialization of metal fibres and fibre products in China.
2002(2):122-124.
Abstract:
Nanostructured AgSnO 2 powders were prepared by high energy ball milling. After hot press sintering, the nanostructured AgSnO 2 contact materials were obtained. Compared with the AgSnO 2In 2O 3 prepared by internal oxidation with clustered at crystal boundary, the nonostructured AgSnO 2 Composite bulk has the microstructure with nano scaled SnO 2 particles dispersed on the silver matrix.
Nanostructured AgSnO 2 powders were prepared by high energy ball milling. After hot press sintering, the nanostructured AgSnO 2 contact materials were obtained. Compared with the AgSnO 2In 2O 3 prepared by internal oxidation with clustered at crystal boundary, the nonostructured AgSnO 2 Composite bulk has the microstructure with nano scaled SnO 2 particles dispersed on the silver matrix.
2004, 33(1):11-14.
Abstract:
The current research status of tungsten-copper composites used at high temperature in China had been expounded, which involves the fabricating technique, high temperature strength, burning erosive resistance, thermo-shock resistance and dimensional stability, etc. The properties of material have been developing as the sintering-melting method had been used. The high temperature strength was objected to the strength of tungsten skeleton. The thermo-shock resistance was subjected to the Cu-content and its well-distributed in material after melting-penetrating. And through the technologys improving, the burning erosive resistance and dimensional stability in the course of sintering had well been developed.
The current research status of tungsten-copper composites used at high temperature in China had been expounded, which involves the fabricating technique, high temperature strength, burning erosive resistance, thermo-shock resistance and dimensional stability, etc. The properties of material have been developing as the sintering-melting method had been used. The high temperature strength was objected to the strength of tungsten skeleton. The thermo-shock resistance was subjected to the Cu-content and its well-distributed in material after melting-penetrating. And through the technologys improving, the burning erosive resistance and dimensional stability in the course of sintering had well been developed.
2000(2):141-143.
Abstract:
采用溶胶－凝胶法和热压烧结相结合的新工艺制备超细Ａ１２Ｏ３ｐ弥散强化铜材料，并对其烧结态和退火态的显微组织和性能进行了观察与分析，结果表明：用这种工艺制和轩的弥散强化铜材料具有高致密度、高强度、高电导率及高温热稳定性等优点；Ａ１２Ｏ３ｐ颗粒平均尺寸约０．１ｕｍ，颗粒间距０．３ｕｍ；９００℃退火后性能改变很小。
采用溶胶－凝胶法和热压烧结相结合的新工艺制备超细Ａ１２Ｏ３ｐ弥散强化铜材料，并对其烧结态和退火态的显微组织和性能进行了观察与分析，结果表明：用这种工艺制和轩的弥散强化铜材料具有高致密度、高强度、高电导率及高温热稳定性等优点；Ａ１２Ｏ３ｐ颗粒平均尺寸约０．１ｕｍ，颗粒间距０．３ｕｍ；９００℃退火后性能改变很小。
1994(1):7-15.
Abstract:
brief introduction is presented for the recent advances in methods of preparing metal fibers including bundle-drowing. chatter- machining and melt-spinning. The status of study and applicataion of metal fibers is also described in this paper.
brief introduction is presented for the recent advances in methods of preparing metal fibers including bundle-drowing. chatter- machining and melt-spinning. The status of study and applicataion of metal fibers is also described in this paper.
2005, 34(2):287-290.
Abstract:
TiO2 nanotube was synthesized successfully by hydrothermal process, using TiO2 powder and NaOH as the precurser. The micro-morphology and optical properties were characterized by XRD, SEM, HRTEM, UV Absorption Spectra Analyzer and Spectroradiometer, and the formation mechanism was also studied. The results showed that the product is anatase TiO2 nanotube with multiple layers wall, 10 nm~50 nm in the out-diameter, several micron to tens in the length, and opened in both of ends. The formation mechanism of the tube is coordinate with 3-2-1D model. The UV Absorption Spectra and PL spectra showed that the TiO2 nanotubes present blue-shift phenomenon compared to the raw material. The PL spectra also showed that at the visible band the luminous intensity of the TiO2 nanotubes increased obviously.
TiO2 nanotube was synthesized successfully by hydrothermal process, using TiO2 powder and NaOH as the precurser. The micro-morphology and optical properties were characterized by XRD, SEM, HRTEM, UV Absorption Spectra Analyzer and Spectroradiometer, and the formation mechanism was also studied. The results showed that the product is anatase TiO2 nanotube with multiple layers wall, 10 nm~50 nm in the out-diameter, several micron to tens in the length, and opened in both of ends. The formation mechanism of the tube is coordinate with 3-2-1D model. The UV Absorption Spectra and PL spectra showed that the TiO2 nanotubes present blue-shift phenomenon compared to the raw material. The PL spectra also showed that at the visible band the luminous intensity of the TiO2 nanotubes increased obviously.
2002(1):8-12.
Abstract:
Aluminum nitride(AlN) has excellent thermal, electrical and mechanical properties, and attracts more and more attention. This paper relates the development of fabricating high thermal conductivity AlN ceramics process, including powder preparation, molding, sintering. It is suggested that research on low cost powder preparation technology and net shape molding technology are valuable.
Aluminum nitride(AlN) has excellent thermal, electrical and mechanical properties, and attracts more and more attention. This paper relates the development of fabricating high thermal conductivity AlN ceramics process, including powder preparation, molding, sintering. It is suggested that research on low cost powder preparation technology and net shape molding technology are valuable.
2006, 35(7):1167-1171.
Abstract:
Electrospinning technique is playing an important role and has been regarded as one of the simplest and most effective techniques in the field of nanofibers fabrication. Various kinds of nanofibers have been prepared using this method, including polymers and inorganic nanofibers. In this paper, a comprehensive review is presented on the fabrication of inorganic nanofibers using electrospinning technique, including its mechanism, modification and effecting factors. In addition, the applications and future trends are presented and discussed for the inorganic nanofibers in this paper.
Electrospinning technique is playing an important role and has been regarded as one of the simplest and most effective techniques in the field of nanofibers fabrication. Various kinds of nanofibers have been prepared using this method, including polymers and inorganic nanofibers. In this paper, a comprehensive review is presented on the fabrication of inorganic nanofibers using electrospinning technique, including its mechanism, modification and effecting factors. In addition, the applications and future trends are presented and discussed for the inorganic nanofibers in this paper.
2002(3):229-231.
Abstract:
CeO 2 nanoparticles hydrosol was synthesized by colloidal chemical method. The optimum experiment conditions for the preparation of CeO 2 nanoparticles hydrosol were discussed. The effects of pH values, the reactant concentration and temperature on peptization process were studied. TEM photos showed that the CeO 2 nanoparticles were spherical in shape and the size was about 3nm. Particle size distribution was in narrow range, and no agglomerates were observed. ED images indicated that the CeO 2 nanoparticles were polycrystalline structure, and some of CeO 2 were monocrystal particles.
CeO 2 nanoparticles hydrosol was synthesized by colloidal chemical method. The optimum experiment conditions for the preparation of CeO 2 nanoparticles hydrosol were discussed. The effects of pH values, the reactant concentration and temperature on peptization process were studied. TEM photos showed that the CeO 2 nanoparticles were spherical in shape and the size was about 3nm. Particle size distribution was in narrow range, and no agglomerates were observed. ED images indicated that the CeO 2 nanoparticles were polycrystalline structure, and some of CeO 2 were monocrystal particles.
2001(6):401-405.
Abstract:
Important Tungsten alloys include W Ni Fe, W Ni Cu, W Cu, and WC Co. In the 21th century, nanograin tungsten alloys will emerge as new materials with muctiple functions and ultrahigh properties. Nanograin bulk tungsten alloys prepared from nanocrystalline powders will exhibit superior physical and mechanical properties, and have potential advantages in microelectronic applications, such as, heat sinks, electronic packages, and anti armor applications. This paper reviews the current research on nanograin refractory tungsten alloy composite powders, introduces numerous technique for nanometer tungsten alloy powder preparation, and points out research directions of nanometer refractory tungsten alloy materials.
Important Tungsten alloys include W Ni Fe, W Ni Cu, W Cu, and WC Co. In the 21th century, nanograin tungsten alloys will emerge as new materials with muctiple functions and ultrahigh properties. Nanograin bulk tungsten alloys prepared from nanocrystalline powders will exhibit superior physical and mechanical properties, and have potential advantages in microelectronic applications, such as, heat sinks, electronic packages, and anti armor applications. This paper reviews the current research on nanograin refractory tungsten alloy composite powders, introduces numerous technique for nanometer tungsten alloy powder preparation, and points out research directions of nanometer refractory tungsten alloy materials.
2002(5):325-329.
Abstract:
The Sol-Gel (S-G) method is a moderate temperature process for prepa ring nanomaterials. In this paper, we discuss the principle of the S-G method, problems associated with it, as well as the hydrolysis characteristics of inor ganic compounds and metal alkoxides. By way of case study we consider the S-G p rocessing SnO2. We also go on to consider the future of the S-G method.
The Sol-Gel (S-G) method is a moderate temperature process for prepa ring nanomaterials. In this paper, we discuss the principle of the S-G method, problems associated with it, as well as the hydrolysis characteristics of inor ganic compounds and metal alkoxides. By way of case study we consider the S-G p rocessing SnO2. We also go on to consider the future of the S-G method.
2003(2):81-86.
Abstract:
TiAl based alloys have an excellent potential because of their low density and good elevated temperature properties, but the chief roadblock to their application is poor room temperature ductility. This paper summarized influencing factors of room temperature ductility of TiAl based alloys and some research progress in improving room temperature ductility through adding alloy elements and varying process method which can control the microstructure of TiAl based alloys.
TiAl based alloys have an excellent potential because of their low density and good elevated temperature properties, but the chief roadblock to their application is poor room temperature ductility. This paper summarized influencing factors of room temperature ductility of TiAl based alloys and some research progress in improving room temperature ductility through adding alloy elements and varying process method which can control the microstructure of TiAl based alloys.
2003(4):272-275.
Abstract:
The titania film was formed by micro -arc oxidation on titanium alloys.The microstructure and chemical composition were studied by SEM,XRD.At the same time ,the hardness,elastic modulus and scratch resista nce measurement were carried out as well by nano -indentation and scratch machine.The results show that the micro -arc oxidation film which is consisted of cry stal and little amorphous phase has nano structure .The hardness and elastic modulus are 0.76GPa and 34.6GPa respectively.There is no film destroyed unless under high load.
The titania film was formed by micro -arc oxidation on titanium alloys.The microstructure and chemical composition were studied by SEM,XRD.At the same time ,the hardness,elastic modulus and scratch resista nce measurement were carried out as well by nano -indentation and scratch machine.The results show that the micro -arc oxidation film which is consisted of cry stal and little amorphous phase has nano structure .The hardness and elastic modulus are 0.76GPa and 34.6GPa respectively.There is no film destroyed unless under high load.
2006, 35(5):673-677.
Abstract:
Processing map is an effective tool for the optimization of materials workability, product property control and defect avoidance. Processing map is constructed by the superimposition of power dissipation efficiency and the instability maps, and can be divided into a safe domain and an unsafe domain. The developments of the Raj map and the processing map based on Dynamic Material Model (DMM) were reviewed in this paper. The DMM theory was introduced first, and then a comparison of different instability criteria were made to help to achieve a better control of microstructure during processing. Different deformation mechanisms, including dynamic recrystalli- zation, superplastic deformation, wedge cracking, formation of adiabatic shear bands and globulazation of lamella alpha were explained by the processing map based on DMM.
Processing map is an effective tool for the optimization of materials workability, product property control and defect avoidance. Processing map is constructed by the superimposition of power dissipation efficiency and the instability maps, and can be divided into a safe domain and an unsafe domain. The developments of the Raj map and the processing map based on Dynamic Material Model (DMM) were reviewed in this paper. The DMM theory was introduced first, and then a comparison of different instability criteria were made to help to achieve a better control of microstructure during processing. Different deformation mechanisms, including dynamic recrystalli- zation, superplastic deformation, wedge cracking, formation of adiabatic shear bands and globulazation of lamella alpha were explained by the processing map based on DMM.
1995(3):18-25.
Abstract:
A definition of functioually gradient material(FGM) is given.The current status of the study on material design, material fabrication and material evaluation is introduced.Application forecasts of the materials in the fields of aeronautic and space transportation, biomediciue, mechanical engineering,optics,electromaguetism,chemical industry and nuclear energy engineering etc.are described.Finally,the prospects of the study are discussed in this poper.
A definition of functioually gradient material(FGM) is given.The current status of the study on material design, material fabrication and material evaluation is introduced.Application forecasts of the materials in the fields of aeronautic and space transportation, biomediciue, mechanical engineering,optics,electromaguetism,chemical industry and nuclear energy engineering etc.are described.Finally,the prospects of the study are discussed in this poper.
