Volume 0,Issue 6,1996 Table of Contents
1996(6).
Abstract:
采用磁悬浮区域熔炼的方法制备了ＴｉＡｌ合金ＰＳＴ晶体，然后在８００℃下对其压缩性能和变形组织分别进行了测试和观察。结果表明，在８００℃时的屈服强度取决于片层界面与压缩轴的夹角φ在φ＝９０°时屈服强度最高，而φ＝４５°时最低。８００℃时屈服强度较室温下的有较大程度下降，这与α２相中锥面滑移系｛１１２１｝＜１１２６＞的临界分切应力的降低有关．
采用磁悬浮区域熔炼的方法制备了ＴｉＡｌ合金ＰＳＴ晶体，然后在８００℃下对其压缩性能和变形组织分别进行了测试和观察。结果表明，在８００℃时的屈服强度取决于片层界面与压缩轴的夹角φ在φ＝９０°时屈服强度最高，而φ＝４５°时最低。８００℃时屈服强度较室温下的有较大程度下降，这与α２相中锥面滑移系｛１１２１｝＜１１２６＞的临界分切应力的降低有关．
1996(6).
Abstract:
分析了Ａｌ－Ｌｉ二元单晶体锯齿流变的应力幅度与被钉扎位错的时效时间、应变量和温度的关系，结果表明：其应力幅度的变化趋势符合动态应变时效的理论模型，并且与位错时效程度的饱和、δ’粒子被切割和锯齿流变（ＰＬＣ）带的运动有关。
分析了Ａｌ－Ｌｉ二元单晶体锯齿流变的应力幅度与被钉扎位错的时效时间、应变量和温度的关系，结果表明：其应力幅度的变化趋势符合动态应变时效的理论模型，并且与位错时效程度的饱和、δ’粒子被切割和锯齿流变（ＰＬＣ）带的运动有关。
1996(6).
Abstract:
探讨了Ｎｂ２Ｏ３和ＭｎＯ２掺杂对３７．５ｐｂ（Ｍｇ，Ｎｂ）Ｏ３－２５ＰｂＺｒＯ３－３７．５ＰｂＴｉＯ３材料的介电、压电特性的影响。结果表明，添加１ｍｏｌ％Ｎｂ２Ｏ３能改善陶瓷的烧结性能，提高材料的体电阻率，从而进一步提高了样品的Ｋｐ及εｒ值；添加１．０ｍｏｌ％ＭｎＯ２能有效提高Ｑｍ，但同时降低了Ｋｐ及εｒ值。
探讨了Ｎｂ２Ｏ３和ＭｎＯ２掺杂对３７．５ｐｂ（Ｍｇ，Ｎｂ）Ｏ３－２５ＰｂＺｒＯ３－３７．５ＰｂＴｉＯ３材料的介电、压电特性的影响。结果表明，添加１ｍｏｌ％Ｎｂ２Ｏ３能改善陶瓷的烧结性能，提高材料的体电阻率，从而进一步提高了样品的Ｋｐ及εｒ值；添加１．０ｍｏｌ％ＭｎＯ２能有效提高Ｑｍ，但同时降低了Ｋｐ及εｒ值。
1996(6).
Abstract:
研究了配碳量与Ｎｉ／Ｃｏ比对ＷＣ－９（Ｎｉ－Ｃｏ）硬质合金抗弯强度的影响。实验结果表明：ＷＣ－３Ｎｉ－６Ｃｏ的配碳量是６．０４ｗｔ％时，其抗弯强度与ＷＣ－９Ｃｏ硬质合金相当；Ｎｉ的分布均匀性对抗弯强度的影响极其重要，粗粒Ｎｉ粉或（和）较多η相的存在都会使硬质合金形成脆性断裂，直接影响合金的抗弯强度。
研究了配碳量与Ｎｉ／Ｃｏ比对ＷＣ－９（Ｎｉ－Ｃｏ）硬质合金抗弯强度的影响。实验结果表明：ＷＣ－３Ｎｉ－６Ｃｏ的配碳量是６．０４ｗｔ％时，其抗弯强度与ＷＣ－９Ｃｏ硬质合金相当；Ｎｉ的分布均匀性对抗弯强度的影响极其重要，粗粒Ｎｉ粉或（和）较多η相的存在都会使硬质合金形成脆性断裂，直接影响合金的抗弯强度。
1996(6):1-6.
Abstract:
he development of zirconium alloys in Light Water Reactors (LWR) is reviewed, and the dominant technological issues and the correlative standard in the application are discussed.
he development of zirconium alloys in Light Water Reactors (LWR) is reviewed, and the dominant technological issues and the correlative standard in the application are discussed.
1996(6):7-13.
Abstract:
he wear behaviors and mechanisms, the factors affecting the transverse rupture strength, the correlation between fracture toughness and the mean free path length of ductile phase, and the various fracture modes of WC-Co cemented carbides used for cutters in coaling mining machine are reviewed. It is suggested that abrasive wear, impact fatigue and thermal fatigue are the main types of failure of WC-Co cutters. It is pointed out that the major approaches to raising the service life of the cutter are the control of the she and the contiguous extent of the WC grain and the lattice type of the ductile phase.
he wear behaviors and mechanisms, the factors affecting the transverse rupture strength, the correlation between fracture toughness and the mean free path length of ductile phase, and the various fracture modes of WC-Co cemented carbides used for cutters in coaling mining machine are reviewed. It is suggested that abrasive wear, impact fatigue and thermal fatigue are the main types of failure of WC-Co cutters. It is pointed out that the major approaches to raising the service life of the cutter are the control of the she and the contiguous extent of the WC grain and the lattice type of the ductile phase.
1996(6):14-18.
Abstract:
Coatings on reinforcements, fabrication methods of the coatings and their effects on the interface and properties of metal matrix composites are reviewed. Various coatings matrix composites are classified as wetting coating, barrier coating and regulating interfacial coating according to the functions of the coatings such as improving wettability, barriering interfacial reaction and regulating interfacial properties, etc. Fabrication methods including electroless plating, chemical vaPOr depositinn,sol-gel technique and other methods are briefly discussed. Effects of single coatings, double coatings and complex coatings on the interface and properties of metal matrix composites are also introduced.
Coatings on reinforcements, fabrication methods of the coatings and their effects on the interface and properties of metal matrix composites are reviewed. Various coatings matrix composites are classified as wetting coating, barrier coating and regulating interfacial coating according to the functions of the coatings such as improving wettability, barriering interfacial reaction and regulating interfacial properties, etc. Fabrication methods including electroless plating, chemical vaPOr depositinn,sol-gel technique and other methods are briefly discussed. Effects of single coatings, double coatings and complex coatings on the interface and properties of metal matrix composites are also introduced.
1996(6):23-27.
Abstract:
研究了热暴露温度和氢对Ｔｉ８１１合金棒材热盐应力腐蚀（ＨＳＳＣ）性能的性能。结果表明：Ｔｉ８１１合金ＨＳＳＣ性能对暴露温度敏感，在暴露温度低于４２５℃时，合金无ＨＳＳＣ现象，高于４８０℃时，合金发生明显ＨＳＳＣ，性能恶化。合金发生ＨＳＳＣ的临界温度为４５０℃。在ＨＳＳＣ过程中有氢产生，氢优先沿晶界扩散，盐蚀区氢和氧含量高于基体，使材料脆化。
研究了热暴露温度和氢对Ｔｉ８１１合金棒材热盐应力腐蚀（ＨＳＳＣ）性能的性能。结果表明：Ｔｉ８１１合金ＨＳＳＣ性能对暴露温度敏感，在暴露温度低于４２５℃时，合金无ＨＳＳＣ现象，高于４８０℃时，合金发生明显ＨＳＳＣ，性能恶化。合金发生ＨＳＳＣ的临界温度为４５０℃。在ＨＳＳＣ过程中有氢产生，氢优先沿晶界扩散，盐蚀区氢和氧含量高于基体，使材料脆化。
1996(6):40-43.
Abstract:
研究了Ｔｉ－１．５Ｎｉ、Ｔｉ－０．５Ｆｅ、Ｔｉ－１．５Ｎｉ－０．５Ｃｕ、Ｔｉ－１．５Ｎｉ－０．５Ｆｅ－０．３Ｃｕ４种合金在９５℃，４０ｇ／Ｌ Ｈ２ＳＯ４＋８０ｇ／Ｌ ＭｎＳＯ４电解二氧化锰溶液中作阳极时的抗钝化性能。研究表明：以上４种合金都具有比ＴＡ２优异的抗钝化性能，ＴｉＮｉＦｅ的最为优异，在电流密度低于８０Ａ／ｍ＾２时，阳极表面不生成氧化膜，析出相Ｔｉ２Ｎｉ对提高抗钝化性起关键作用。ＴｉＮｉＦ
研究了Ｔｉ－１．５Ｎｉ、Ｔｉ－０．５Ｆｅ、Ｔｉ－１．５Ｎｉ－０．５Ｃｕ、Ｔｉ－１．５Ｎｉ－０．５Ｆｅ－０．３Ｃｕ４种合金在９５℃，４０ｇ／Ｌ Ｈ２ＳＯ４＋８０ｇ／Ｌ ＭｎＳＯ４电解二氧化锰溶液中作阳极时的抗钝化性能。研究表明：以上４种合金都具有比ＴＡ２优异的抗钝化性能，ＴｉＮｉＦｅ的最为优异，在电流密度低于８０Ａ／ｍ＾２时，阳极表面不生成氧化膜，析出相Ｔｉ２Ｎｉ对提高抗钝化性起关键作用。ＴｉＮｉＦ
1996(6):44-45.
Abstract:
reasonable and economic technological route for high pure titanium is put forward by the analyses of refining effects for the electrobeam melting of iodide-processing titanium.
reasonable and economic technological route for high pure titanium is put forward by the analyses of refining effects for the electrobeam melting of iodide-processing titanium.
1996(6):46-49.
Abstract:
he properties and characteristics of aluminium matrix composites. e.g. high strength-to-weight ratio, high stiffness-to-weight ratio and superior damping characteristic, are introduced. The application of aluminium matrix composites made by casting in automotive industry are mainly presented.
he properties and characteristics of aluminium matrix composites. e.g. high strength-to-weight ratio, high stiffness-to-weight ratio and superior damping characteristic, are introduced. The application of aluminium matrix composites made by casting in automotive industry are mainly presented.
1996(6):50-53.
Abstract:
igh-intensity ultrasound entering a molten metal, fibers can combined with the metal shortly, which results in the composites of excellent mechanical property. Under the function of ultrasonic infiltration, a liquid metal can permeate into a particulate perform or can be mixed with the particulates homogeneously. Zinc or aluminium plating on steel wire can be completed by the ultrasonic infiltration coating. Ultrafine metal powder can be prepared successfully by means of an ultrasonic electrolysis process.
igh-intensity ultrasound entering a molten metal, fibers can combined with the metal shortly, which results in the composites of excellent mechanical property. Under the function of ultrasonic infiltration, a liquid metal can permeate into a particulate perform or can be mixed with the particulates homogeneously. Zinc or aluminium plating on steel wire can be completed by the ultrasonic infiltration coating. Ultrafine metal powder can be prepared successfully by means of an ultrasonic electrolysis process.
