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Abstract:To the problems in the tube eddy testing, some improved ways are given by using a three-point probe matching the eddy instrument model ET-204 with low field voltage, and selecting a phase having the optimum singnal-to-noise ratio with impedance plane technique.The testing results show that the method possesses a jamproof capability for distant testing with high sensitivity.

Abstract:采用透射電鏡（ＴＥＭ）研究了Ｎｉ４７Ｔｉ４４Ｔａ９合金中馬氏體和β－Ｔａ相的形貌及精細(xì)組織。結(jié)果表明，馬氏體主要呈細(xì)板條狀和群團(tuán)狀兩種形貌，其亞結(jié)構(gòu)為孿晶；β－Ｔａ相粒子呈橢球狀分布于ＴｉＮｉ基體中，其內(nèi)部存在大量位錯(cuò)和孿晶。

Abstract:在１７５℃下實(shí)驗(yàn)測得ＭｎＣｌ２在ＮａＡｌＣｌ４熔體中的溶解度為０．０８６±０．００６ｍｏｌ％。錳可以在陰極上與鋁發(fā)生共電沉積，生成含錳量為８ａｔｏｍ％～１０ａｔｏｍ％的二元合金。鋁錳共電沉積可以顯著地加快電化學(xué)成核步驟，從而完全消除低電流密度下絮狀沉積產(chǎn)物的生成，且對高電流密度下枝晶產(chǎn)物的生成也有抑制作用。

Abstract:So far, many methods have been tried and applied in the synthesis of Bi-based superconductor powders including conventional solid state reaction route, solution self propagating high-temperature synthesis, co-precipitation route, sol-gel process, freeze-drying,solvent evaporating technique and micro-emulsion based powder synthesis. In this paper, the principles, advantages and disadvantages of these methods, and their applications in Bi-based superconductor powder synthesis are discussed.

Abstract:The method of production to prepare rare-earth hydrogen-stored alloys intended to be used for producing Ni-MH batteries is stated in brief. Multi-element rare-earth hydrogen-stored alloy ingots have been obtaineal by induction melting method of using ceramic crucible and water-cooling crucible, respectively. It is indicated that the concentration of impurity carried into the melt can be limited within some hundreds of ppm. By using a suitable water-cooling ceramic crucible, we can obtain the uncontaminated alloy ingots with homogenous and accurate composition. The process characteristics. of induction melting method with cold crucible and the result analysis of hydrogen stored alloy ingots obtained are introduced as well.

Abstract:通過對不同應(yīng)力幅度下高純鈦的反復(fù)彎曲疲勞的研究，發(fā)現(xiàn)在較低應(yīng)力幅度下（～±１００ＭＰａ），材料表現(xiàn)出循環(huán)軟化，伴隨表面滑移帶數(shù)量的增加、發(fā)達(dá)的滑移帶擠出片的出現(xiàn)。疲勞裂紋萌生主要與滑移帶相關(guān)，在擠出物內(nèi)存在兩類疲勞損傷形式：沿滑移帶的孔洞和與滑移帶垂直的微裂紋。在較高應(yīng)力幅度下（～±２００ＭＰａ），則表現(xiàn)為硬化，次滑移及晶界附近多個(gè)滑移系同時(shí)起動，有大的形變孿晶出現(xiàn)。裂紋于滑移帶、李晶界和晶界結(jié)點(diǎn)萌生。斷口特征復(fù)雜，但與表面變形特征有對應(yīng)關(guān)系。ＴＥＭ亞結(jié)構(gòu)分析表明，隨應(yīng)力幅度的提高，位錯(cuò)組態(tài)分別為散亂分布

Abstract:The novel yielding criterion for porous materials is employed to study the densification, workhardening and poisson's ratio of sintered materials during plastic processings. Relevant functions under uniaxial compressive stress stste are derived for the abobve factors the experimental data in literature are cited to test the predictions. Besides, recompressing process is also researched.

Abstract:將顆粒形貌及粒度不同的２種仲鎢酸銨（ＡＰＴ），按工業(yè)生產(chǎn)條件，進(jìn)行摻雜鎢絲生產(chǎn)的對比試驗(yàn)。結(jié)果發(fā)現(xiàn)：當(dāng)ＡＰＴ的平均粒度為４０～４５μｍ，且具有多個(gè)晶塊嵌鑲成類球狀的形貌特征時(shí)，可以進(jìn)一步改善摻雜鎢絲的綜合性能。

Abstract:The crevice corrosion resistance of corn m ercially pure titanium and Ti-0.3% Mo 0.8% Ni alloy in boiling 25% NaCl and HCl solution was studied with electrochemical techniques. The results indicated that the Ti-0.3% Mo-0.8% Ni alloy have much better crevice corrosion resistance than commercially pure titanium. It is mainly related with the low hydrogen overpotential of the nickel which promoted the cathode polarization, increased the passivation ability. The nickel enriched in the internal crevice surface enhanced. the stability of passive film.

Abstract:研究了在鉬中摻入少量稀土元素鈦的氧化物（Ｎｄ２Ｏ３）后，對鉬絲的組織及性能的影響。結(jié)果表明，Ｎｄ２Ｏ３的加入明顯細(xì)化了燒結(jié)鉬坯條的晶粒；鉬絲的再結(jié)晶溫度和強(qiáng)度均隨摻入Ｎｄ２Ｏ３量的增加而顯著升高，并有較長的一次再結(jié)晶溫區(qū)，經(jīng)１７５０℃高溫退火后，室溫延伸率仍可達(dá)到３０％。實(shí)驗(yàn)表明，摻入Ｎｄ２Ｏ３量控制在１．０ｗｔ％左右時(shí)，加工鉬絲材的顯微組織和性能最好。

Abstract:利用直接光譜法測定銻中Ａｓ、Ｃｏ、Ｂｉ、Ｐｂ、Ｃｒ、Ｓｎ、Ｍｇ、Ｆｅ、Ａｌ、Ｎｉ、Ｃｄ、Ｃｕ、Ｚｎ、Ａｇ等微量雜質(zhì)，選擇石墨粉作為緩沖劑，改善了譜線的重復(fù)性，對樣品處理進(jìn)行了詳細(xì)的分析研究，以最佳的光譜測定條件，使元素測定下限達(dá)到３×１０－４％─３×１０－３％，相對誤差在２２％以內(nèi)，為金屬銻純度的全面分析建立了可靠的分析方法。

Abstract:After investisating the effect of using monochromaton and filter on the measurement precision, a critical formula of optimal conditions for using monochromator was derived. At last, a practical operation method was proposed.

Abstract:介紹了形狀記憶合金熱機(jī)械穩(wěn)定性測試儀研制中的有關(guān)問題。包括環(huán)境溫度、應(yīng)力大小、響應(yīng)時(shí)間和功率的確定以及整機(jī)的硬件、軟件系統(tǒng)。該裝置的冷熱循環(huán)溫度范圍：－１５０℃～＋１２０℃，形變次數(shù)計(jì)算范圍１～９９９９，最大載荷２０ｋｇ，最大位移５０ｍｍ，位移測量精度為±０．１ｍｍ。用該儀器記錄的曲線可用來研究合金記憶性能的變化、臨界負(fù)荷及使用壽命等評價(jià)記憶合金特性的實(shí)用參數(shù)。

Abstract:The development and features of cold hearth melting methods with electron beam and plasma are summarized, the furnace structure, operation principle and individual advantage of melting pure Ti and Ti-6Al-4V alloy are also stated in this paper.