Abstract:This paper presents a series of Al-Li alloys and their productive capacity all over the world. The application and improvement of Al-Li alloys are also described in the paper.

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.

Abstract:inetics of isothermal transformation of supersaturated phase of ordered a2 was investagated with method of quantitative metallographic examination and X- ray diffraction. The relationship between the amount of 7 phase precipitation and the isothermal transformation time with the both method is agreed. The rate of isothermal transformation in alloy 45Al is larger remarkably than the one in alloy 42Al. Under the eutectoid temperature in Ti- Al phase diagram the rate of transformation decreases with temperature,ho it is.not able that the isothermal transformation curve becomes the shape of letter C.

Abstract:探讨了粉末应力松弛的基本规律，提出了粉末应力松弛的流变机理，采用非线性流变模型定量描述了粉末应力松弛的应力和应变关系，计算结果表明，理论计算值和实验值吻合良好。

Abstract:he lattice parameter c values of highly textured YBCO thick films were calculated by using an X-ray diffraction dual-line method. The lattice parameter values of samples prepared on Ni substrate rather smaller than those of sintered samples and thick films prepared on Ag-Pd substrate. Increasing substrate temperature during spray, sintering temperature after spray, and moving speed of smsples during zone melting makes lattice Parameter c decrease. Generally, the samples which have higher To have rather smaller lattice parameter c values.

Abstract:ffect of Zr addition on the property stability of CuZnAl alloy was investigated. It showed. Zr- doped could reduce martensite stabilization trend and improve property stability in the mid-temperature. X-ray diffraction results showed that Zr restrained the variation of order parameter and the formation of equilibrium phase when the alloy aged in the mid-temperature.This might have relation with the change of excess vacancy concentration which resulted from grain refining.

Abstract:研究了室温和４００℃去应力退火状态Ｚｒ－４合金对称拉－压低周疲劳行为。建立了循环和单调加载方式下Ｚｒ－４合金应力－应变曲线方程和循环应变幅－疲劳寿命之间的关系；分析了温度对Ｚｒ－４合金变形行为和疲劳性能的影响；讨论了高温疲劳寿命预测方法；根据疲劳断口ＳＥＭ观察结果，分析了Ｚｒ－４合金在室温和４００℃疲劳断裂方式的异同。结果表明，Ｚｒ—４合金室温下的循环应力－应变曲线表现为循环硬化，而４００℃下表现为循环软化；室温和４００℃下的循环应变幅－疲劳寿命关系分别为△εｐ·Ｎｆ０．７６６８＝４８．９４，△εｐ·Ｎｆ

Abstract:he investigating results of preparing high Performance Si3N4 powder by carbon reduction and nitridation from SiO2 is reported in this paper.lt has been studied that the effeCt of the technological factors such as the nitriding temperature,the nitriding time and nitrogen flow,etC.on the colour,particle shape,Pareicle size, particle distribution and phase structure of the nitriding products. The forming conditions of the amorphism,SiO2 and SiC products are discussed.Results show that the nitriding technological factors influence obviously the performances of the nitriding products.High quality St3N. POwder with high a phase ratio,fine particle and homogeneous particle distribution can be prepared by the technological conditions of using the nitriding temperature 1450t,the nitriding time 2h and the nitrogen flow 2.5L/ min.

Abstract:研究了工艺参数对制备ＰｂＯ２／Ｔｉ电极性能的影响，通过ＳＥＭ、ＸＲＤ和强化寿命结果分析，得出了制备Ｐｂｏ２／Ｔｉ电极的最佳工艺条件即镀β－ＰｂＯ２的最佳电流密度３Ａ／ｄｍ２，镀液温度６０℃。试验结果表明，在Ｈ２ＳＯ４、ＨＮＯ３介质中，对析氧反应而言，Ｔｉ／ＰｂＯ２电极具有好的催化活性和高的阳极电位；在１５０ｇ／ＬＨ２ＳＯ４、６０℃、２００Ａ／ｄｍ２条件下，强化寿命最高达１３０９ｈ。

Abstract:叙述了在钼粉的工业化生产条件下采用原料添加法来提高最终粉末粒度，改善原料工艺性能的试验。研究表明：在钼酸铵原料中添加一定组份的钥粉，能有效地改善钼酸铵在动态焙解还原时的分散性和流动性，选择不同的添加量和添加粉粒度，可有效地把钼粉的ＦＳＳＳ粒度从２．５μｍ提高到４．２μｍ，从而可根据用粉要求，选择合适的添加工艺，来制取理想的钼粉。

Abstract:The effects of different aid-gases and technological parameters on laser cutting of titanium alloy have been investigated. The characters of cut plane and heat affected zone of laser cutting have been analyzed. The experimental results show that the best cutting quality can be obtained when argon is used as an aid-gas. The laser power and cutting speed have of feets on the cutting width and heat affected zone. The cut plane can be divided into two zones which have different appearance. There is a distinguishing boundary between the two zones. The width of heat affected zone on upper surface is narrower than that on lower surface.

Abstract:wo methods of measuring differential pressure of hydrogen- the gas flow method and the gas weight method are presented and compared each other during the hydrogen-charging to Ti-alloy.lt is shown that the results obtained by two methods are basically indentical.

Abstract:his article Presents the historical development of the implant metallic malerials in human body. The characters of the stainless steel, cobaltchormium alloys,titanium alloys and new type of biological engineering metallic materials-shape memory alloys are described. The domestic-oversea general situation and the PractiCeS of their application are also presented in this paper.

Abstract:he lst International Symposium on Structural Intermetallics is introduced in this poper.The important achievements in the field of Intermetallics in the world and their prospects in application developments are also reviewed.