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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

Abstract:研究了鈀釕合金中釕的測定方法。在強酸性溶液中（CHCl=5．0mol／L）和在有乙醇作穩(wěn)定劑時，釕（Ⅲ）可與硫脲形成穩(wěn)定的藍綠色配合物；在最大吸收波長（λmax=620nm）處測定，50μg／50ml～250μg／50ml的釕（Ⅲ）符合比爾定律。大量的鈀不干擾釕的測定。對釕含量為0．5％的鈀釕合金8次測定，相對標準偏差為51％，加料回收率為95％～104％。該方法可用于含釕0．5％～2．5％的鈀釕合金中釕的準確測定。

Abstract:研究了熱形變處理對高碳鉛淬鋼絲和高強度低碳低合金（HSLCLA）鋼絲抗低周疲勞和室溫蠕變性能的影響。按最佳效形變參數(shù)（在300℃進行3％軸向拉伸塑性變形5min）熱形變處理后，高碳鉛淬鋼絲和高強度低合金鋼的低周疲勞壽命增加30％～35％，而低溫編變應變分別減少85％和65％。研究表明，熱形變處理僅影響微觀狀態(tài)，例如晶格畸變、內應力、位借密度、亞晶粒大小和固溶體中溶質原子的數(shù)量，但不改變鋼絲的整個微觀結構或強度。在不同溫度進行的內摩擦力研究表明，熱形變的溫度不同，再溶解的固溶原子數(shù)量也不相同，在300℃可達

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.

Abstract:系統(tǒng)研究了高變形率Ｎｉ基帶中的加工和退火織物，用高純Ｎｓ（９９．９９％）為切始坯料進行高變形率室溫軋制，加工率分別為８０％，８９％，９３％和９５％。對加工率為９５％的試樣在７５０℃，８００℃，８５０℃，９００℃，９５℃和１０００℃進行５ｈ再結晶退火。用Ｘ射線衍射，極圖，取向分布函數(shù)等方法分析；討論了Ｎｉ基帶加工織構，再結晶退火織構的形成和發(fā)展。結果表明，隨總冷加工率的增加，在Ｎｉ基帶的加工織構中，

Abstract:向工業(yè)純銅中加入不同含量的Ｌｉ，結果使工業(yè)純銅中夾雜物氧，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，而對其它微量雜質元素Ｆｅ，Ｐ，Ｓｉ等，Ｌｉ的作用表現(xiàn)甚微，并對以上結果分別進行了熱力學定量和定性分析，結果表明；Ｌｉ對工業(yè)純銅中Ｏ，Ｓ等具有優(yōu)異的凈化作用是由于Ｌｉ的化學活性很大的緣故，而對微量雜質元素Ｆｅ，Ｐ，Ｓｉ基本不

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.

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.

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.

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.

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.

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.

Abstract:實驗采用２種方法（１）添加合金元素雙降低第二相熔點，促進Ｗ向粘結相中擴散和溶解；（２）將原始混合粉末高能球磨。結果表明，添加合金元素Ｃｏ可起到活化液相燒結的作用，燒結溫度可降低３０－５０℃，

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.

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.

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%.