Volume 0,Issue 5,1999 Table of Contents
1999(5).
Abstract:
The microstructures of the alloys near the Al3Ti-8Mn composition region of the Al-Ti-Nb-8Mn quaternary system change with variation of the Nb content. The microstructures have been investigated using optical microscopy, scanning electron mi
The microstructures of the alloys near the Al3Ti-8Mn composition region of the Al-Ti-Nb-8Mn quaternary system change with variation of the Nb content. The microstructures have been investigated using optical microscopy, scanning electron mi
1999(5).
Abstract:
研究了钯钌合金中钌的测定方法。在强酸性溶液中（CHCl=5．0mol／L）和在有乙醇作稳定剂时，钌（Ⅲ）可与硫脲形成稳定的蓝绿色配合物；在最大吸收波长（λmax=620nm）处测定，50μg／50ml～250μg／50ml的钌（Ⅲ）符合比尔定律。大量的钯不干扰钌的测定。对钌含量为0．5％的钯钌合金8次测定，相对标准偏差为51％，加料回收率为95％～104％。该方法可用于含钌0．5％～2．5％的钯钌合金中钌的准确测定。
研究了钯钌合金中钌的测定方法。在强酸性溶液中（CHCl=5．0mol／L）和在有乙醇作稳定剂时，钌（Ⅲ）可与硫脲形成稳定的蓝绿色配合物；在最大吸收波长（λmax=620nm）处测定，50μg／50ml～250μg／50ml的钌（Ⅲ）符合比尔定律。大量的钯不干扰钌的测定。对钌含量为0．5％的钯钌合金8次测定，相对标准偏差为51％，加料回收率为95％～104％。该方法可用于含钌0．5％～2．5％的钯钌合金中钌的准确测定。
1999(5).
Abstract:
研究了热形变处理对高碳铅淬钢丝和高强度低碳低合金（HSLCLA）钢丝抗低周疲劳和室温蠕变性能的影响。按最佳效形变参数（在300℃进行3％轴向拉伸塑性变形5min）热形变处理后，高碳铅淬钢丝和高强度低合金钢的低周疲劳寿命增加30％～35％，而低温编变应变分别减少85％和65％。研究表明，热形变处理仅影响微观状态，例如晶格畸变、内应力、位借密度、亚晶粒大小和固溶体中溶质原子的数量，但不改变钢丝的整个微观结构或强度。在不同温度进行的内摩擦力研究表明，热形变的温度不同，再溶解的固溶原子数量也不相同，在300℃可达
研究了热形变处理对高碳铅淬钢丝和高强度低碳低合金（HSLCLA）钢丝抗低周疲劳和室温蠕变性能的影响。按最佳效形变参数（在300℃进行3％轴向拉伸塑性变形5min）热形变处理后，高碳铅淬钢丝和高强度低合金钢的低周疲劳寿命增加30％～35％，而低温编变应变分别减少85％和65％。研究表明，热形变处理仅影响微观状态，例如晶格畸变、内应力、位借密度、亚晶粒大小和固溶体中溶质原子的数量，但不改变钢丝的整个微观结构或强度。在不同温度进行的内摩擦力研究表明，热形变的温度不同，再溶解的固溶原子数量也不相同，在300℃可达
1999(5):265-268.
Abstract:
The microstructure of a titanium alloy matrix composite with 10 vol % TiC particles was observed. Based on strengtheningmechanism of a multiphase alloy, various microstructural strengthening behaviours in the composite are estimated. The Mises yieldcriterion is used for estamating the combined modulus strengthening and matrix strengthening. The predlcted yield strength is comPared to the observed yield strength of the composite.
The microstructure of a titanium alloy matrix composite with 10 vol % TiC particles was observed. Based on strengtheningmechanism of a multiphase alloy, various microstructural strengthening behaviours in the composite are estimated. The Mises yieldcriterion is used for estamating the combined modulus strengthening and matrix strengthening. The predlcted yield strength is comPared to the observed yield strength of the composite.
Liu Chunfang
,
Wu Xuan
,
Wang Feiyun
,
Yang Zhijun
,
Feng Yong
,
Zhang Pingxiang
,
Wu Xiaozu
,
Zhou Lian
1999(5):269-272.
Abstract:
系统研究了高变形率Ｎｉ基带中的加工和退火织物，用高纯Ｎｓ（９９．９９％）为切始坯料进行高变形率室温轧制，加工率分别为８０％，８９％，９３％和９５％。对加工率为９５％的试样在７５０℃，８００℃，８５０℃，９００℃，９５℃和１０００℃进行５ｈ再结晶退火。用Ｘ射线衍射，极图，取向分布函数等方法分析；讨论了Ｎｉ基带加工织构，再结晶退火织构的形成和发展。结果表明，随总冷加工率的增加，在Ｎｉ基带的加工织构中，
系统研究了高变形率Ｎｉ基带中的加工和退火织物，用高纯Ｎｓ（９９．９９％）为切始坯料进行高变形率室温轧制，加工率分别为８０％，８９％，９３％和９５％。对加工率为９５％的试样在７５０℃，８００℃，８５０℃，９００℃，９５℃和１０００℃进行５ｈ再结晶退火。用Ｘ射线衍射，极图，取向分布函数等方法分析；讨论了Ｎｉ基带加工织构，再结晶退火织构的形成和发展。结果表明，随总冷加工率的增加，在Ｎｉ基带的加工织构中，
1999(5):273-276.
Abstract:
向工业纯铜中加入不同含量的Ｌｉ，结果使工业纯铜中夹杂物氧，硫含量大幅下降。氧由７．３＊１０＾－５降至（２－３）＊１０＾－６，硫由８．６＊１０＾－６降至（１０－１５）＊１０＾－６，而对其它微量杂质元素Ｆｅ，Ｐ，Ｓｉ等，Ｌｉ的作用表现甚微，并对以上结果分别进行了热力学定量和定性分析，结果表明；Ｌｉ对工业纯铜中Ｏ，Ｓ等具有优异的净化作用是由于Ｌｉ的化学活性很大的缘故，而对微量杂质元素Ｆｅ，Ｐ，Ｓｉ基本不
向工业纯铜中加入不同含量的Ｌｉ，结果使工业纯铜中夹杂物氧，硫含量大幅下降。氧由７．３＊１０＾－５降至（２－３）＊１０＾－６，硫由８．６＊１０＾－６降至（１０－１５）＊１０＾－６，而对其它微量杂质元素Ｆｅ，Ｐ，Ｓｉ等，Ｌｉ的作用表现甚微，并对以上结果分别进行了热力学定量和定性分析，结果表明；Ｌｉ对工业纯铜中Ｏ，Ｓ等具有优异的净化作用是由于Ｌｉ的化学活性很大的缘故，而对微量杂质元素Ｆｅ，Ｐ，Ｓｉ基本不
1999(5):277-280.
Abstract:
The microstructures of the alloys near the Al3Ti-8Mn composition region of the Al-Ti-Nb-8Mn quaternary system changewith variation of the Nb content. The microstructures have been investigated using optical microscopy, scanning electron microscopy(SEM) and transmission electron microscopy(TEM). It is determined that in Al67Mn8Ti22-based alloys modified with Nb the secondphases can be DO22 Al3 (Ti,Nb), L10 TiAl or Ga2Hf type of Al2Ti. The microstructures of four typical experimental alloys, A67,Mn8Ti23Nb2, Al59Mn8Ti30Nb3, Al65Mn8Ti26.5Nb0.5 and Al65Mn8Ti23Nb4,are presented in this paper. The second phase Al3 (Ti, Nb)particles con be dispersed blocky or dendritic,the L10 TiAl particles are ripple-like or needle-like, and Ll10 TiAl arrays alternately withL12 matrix. The netty Al2Ti phase is plate-like under TEM and distributes across the L13 matrix.
The microstructures of the alloys near the Al3Ti-8Mn composition region of the Al-Ti-Nb-8Mn quaternary system changewith variation of the Nb content. The microstructures have been investigated using optical microscopy, scanning electron microscopy(SEM) and transmission electron microscopy(TEM). It is determined that in Al67Mn8Ti22-based alloys modified with Nb the secondphases can be DO22 Al3 (Ti,Nb), L10 TiAl or Ga2Hf type of Al2Ti. The microstructures of four typical experimental alloys, A67,Mn8Ti23Nb2, Al59Mn8Ti30Nb3, Al65Mn8Ti26.5Nb0.5 and Al65Mn8Ti23Nb4,are presented in this paper. The second phase Al3 (Ti, Nb)particles con be dispersed blocky or dendritic,the L10 TiAl particles are ripple-like or needle-like, and Ll10 TiAl arrays alternately withL12 matrix. The netty Al2Ti phase is plate-like under TEM and distributes across the L13 matrix.
1999(5):281-284.
Abstract:
The effects of brazing temperature, holding time and joint clearance on the interface reaction during of titanium vacuumbrazing have been studied. The results show that the interdiffusion takes place between the filler metal and the base titanium duringthe brazing process; the base titanium dissolves into the molten braze alloy and the filler metal in to the base titanium. A nickel-richdiffusion zone is formd between the base titanium and the brazing solder. In it the nickel exists in the form of a Ti2Ni compound, andalso trends to penetrate into the titanium grain boundary.
The effects of brazing temperature, holding time and joint clearance on the interface reaction during of titanium vacuumbrazing have been studied. The results show that the interdiffusion takes place between the filler metal and the base titanium duringthe brazing process; the base titanium dissolves into the molten braze alloy and the filler metal in to the base titanium. A nickel-richdiffusion zone is formd between the base titanium and the brazing solder. In it the nickel exists in the form of a Ti2Ni compound, andalso trends to penetrate into the titanium grain boundary.
1999(5):289.
Abstract:
The microstructure and small energy multi-impact (SEMI) behavior of the transition region between a laser-clad Fe-Albronze coating and its aluminum alloy substrate have been investigated. The results show that the transition region consists of severallayers. The layer adjacent to the clad region is composed of nonuniform block-like Cu9Al4 and Cu3Al phases. The middle layer is characterized by a mixed structure of block-like Cu3Al and needle-like CuAl2. In the layer near to the substrate the volume fractivn of needle-like CuAl, phase decreases and volume fraction of a-Al phase increases when approaching to the substrate. Under SEMI loading,cracks initiate in the CuAl2, phase-rich region. Laser scanning velocity has a significant influence on the volume fraction of CuAl,phase, and thus directly affects the SEMI resistance of the transition region. The laser-clad bronze coatings produced at a scanningvefority of 10mm/s to 14 mm/s has better resistance to SEMI than those produced at higher scanning velocities.
The microstructure and small energy multi-impact (SEMI) behavior of the transition region between a laser-clad Fe-Albronze coating and its aluminum alloy substrate have been investigated. The results show that the transition region consists of severallayers. The layer adjacent to the clad region is composed of nonuniform block-like Cu9Al4 and Cu3Al phases. The middle layer is characterized by a mixed structure of block-like Cu3Al and needle-like CuAl2. In the layer near to the substrate the volume fractivn of needle-like CuAl, phase decreases and volume fraction of a-Al phase increases when approaching to the substrate. Under SEMI loading,cracks initiate in the CuAl2, phase-rich region. Laser scanning velocity has a significant influence on the volume fraction of CuAl,phase, and thus directly affects the SEMI resistance of the transition region. The laser-clad bronze coatings produced at a scanningvefority of 10mm/s to 14 mm/s has better resistance to SEMI than those produced at higher scanning velocities.
1999(5):293-297.
Abstract:
The measuring of characterizing the T1 phase in an aluminium-lithium alloy is established by analyzing the relationship between electron diffraction patterns and micrographs of T1 phase in aluminium-lithium alloy. The response of T1 phase size to heattreatment processing and rare-earth element content are discussed.
The measuring of characterizing the T1 phase in an aluminium-lithium alloy is established by analyzing the relationship between electron diffraction patterns and micrographs of T1 phase in aluminium-lithium alloy. The response of T1 phase size to heattreatment processing and rare-earth element content are discussed.
1999(5):305-309.
Abstract:
The microstructures and morphologies 0f Pt/Ti electrodes produced by ultra-high vacuum (UHV) electron beam evaporating and dc-sputtering at various temperatures have been investigated using X-ray diffraction, scanning electron microscopy and atomicforce microscopy. The results indicate that the microstructures and morphologies of Pt/Ti electrodes are dependent on the variousgrowing modes of Pt/Ti crystal grains. A dense columnar grain structure and texture were observed as a resu1t of electron beam vaporation. UHV electron beam evaporation results in a continuous and stable Pt/Ti film at high temperatures and is reccomended as a bottom electrode processing method for the preparation of ferroelectric thin films with fine properties.
The microstructures and morphologies 0f Pt/Ti electrodes produced by ultra-high vacuum (UHV) electron beam evaporating and dc-sputtering at various temperatures have been investigated using X-ray diffraction, scanning electron microscopy and atomicforce microscopy. The results indicate that the microstructures and morphologies of Pt/Ti electrodes are dependent on the variousgrowing modes of Pt/Ti crystal grains. A dense columnar grain structure and texture were observed as a resu1t of electron beam vaporation. UHV electron beam evaporation results in a continuous and stable Pt/Ti film at high temperatures and is reccomended as a bottom electrode processing method for the preparation of ferroelectric thin films with fine properties.
1999(5):310-312.
Abstract:
The in fluences of magnetic field heat treatment and multiple tempering on the magnetic properties of an AlNthe magneticsteel horseshoe intended for a YF-65 servo valve are studied in this paper. After optimum magnetic field heat treatment and multipletempering, Br, Hc, (BH)max and the appliance gap magnetic flux density are 1350 mT, 62.1 kA/m, 54. 1 kJ/m3 and 225 mT~235mT, respectively.
The in fluences of magnetic field heat treatment and multiple tempering on the magnetic properties of an AlNthe magneticsteel horseshoe intended for a YF-65 servo valve are studied in this paper. After optimum magnetic field heat treatment and multipletempering, Br, Hc, (BH)max and the appliance gap magnetic flux density are 1350 mT, 62.1 kA/m, 54. 1 kJ/m3 and 225 mT~235mT, respectively.
1999(5):313-316.
Abstract:
实验采用２种方法（１）添加合金元素双降低第二相熔点，促进Ｗ向粘结相中扩散和溶解；（２）将原始混合粉末高能球磨。结果表明，添加合金元素Ｃｏ可起到活化液相烧结的作用，烧结温度可降低３０－５０℃，
实验采用２种方法（１）添加合金元素双降低第二相熔点，促进Ｗ向粘结相中扩散和溶解；（２）将原始混合粉末高能球磨。结果表明，添加合金元素Ｃｏ可起到活化液相烧结的作用，烧结温度可降低３０－５０℃，
1999(5):323-325.
Abstract:
The conditions for producing silicide in a si-containing titanium alloy have been studied. The microstructure of several heattreated specimens have been analyzed using EM400 TEM. The results show that the silicide produced under some conditions, and it'snucleation is heterogeneous. The silicide has hexagonal structure with the fo1lowing lattice parameters: a = 0. 767 nm, c = 0. 585 nm,c/a=0. 763. The silicide has a orientation relationship with a phase.
The conditions for producing silicide in a si-containing titanium alloy have been studied. The microstructure of several heattreated specimens have been analyzed using EM400 TEM. The results show that the silicide produced under some conditions, and it'snucleation is heterogeneous. The silicide has hexagonal structure with the fo1lowing lattice parameters: a = 0. 767 nm, c = 0. 585 nm,c/a=0. 763. The silicide has a orientation relationship with a phase.
1999(5):326-329.
Abstract:
The progress in purifying automotive exhaust gas with noble metal catalysts is reviewed. An 4utomotive exhaust purifierconsisting of a monolithic cordierite substrate, a wash-coating and a noble metal catalyst coating is introduced. The properties and development of noble metal catalysts, aided catalysts and stabilizers are described. Further improvement of the purifier is discussedbriefly.
The progress in purifying automotive exhaust gas with noble metal catalysts is reviewed. An 4utomotive exhaust purifierconsisting of a monolithic cordierite substrate, a wash-coating and a noble metal catalyst coating is introduced. The properties and development of noble metal catalysts, aided catalysts and stabilizers are described. Further improvement of the purifier is discussedbriefly.
1999(5):333-335.
Abstract:
A simple accurate method has been developed for the determination of neodymium in the Al-Nd-Ti alloys. The sample wasdissolved in sulphuric acid (1+1) and the neodymium was separated from titanium, aluminum etc. through precipitation in an oxalicacid solution with pH 1. 5~2. 0. The neodymium content was calculated through weighing the neodymia obtained by calciningneodymium oxalate. This method has been successfully applied to routine analysis. The recovery of neodymium is 98. 5%~101. 3%.Relative standard deviation is 1. 34%.
A simple accurate method has been developed for the determination of neodymium in the Al-Nd-Ti alloys. The sample wasdissolved in sulphuric acid (1+1) and the neodymium was separated from titanium, aluminum etc. through precipitation in an oxalicacid solution with pH 1. 5~2. 0. The neodymium content was calculated through weighing the neodymia obtained by calciningneodymium oxalate. This method has been successfully applied to routine analysis. The recovery of neodymium is 98. 5%~101. 3%.Relative standard deviation is 1. 34%.
