摘要
采用复合粉末加压成型的方法 ,在铜基体表面上复合了纳米Cu Zn合金表面层 ,获得了具有纳米结构表面层的铜基复合材料。对基体与表面的界面结构、纳米表面层的微观结构、相变特征及其对材料表面性能的影响进行了研究。结果表明 ,纳米表面层与基体结合良好 ,纳米表面层在经 35 0℃左右退火可获得最佳表面性能 ,显微硬度可达到 2 90HV左右 ,耐磨性明显优于基体材料。对纳米Cu Zn合金的相变过程分析表明 ,Cu Zn纳米晶体 β′相中弥散α相沉淀物的析出有助于强化纳米Cu Zn结构表层。
Copper-matrix composites with nanocrystalline Cu-Zn surface layer were obtained by using composite powder compacting process. The interface between matrix and surface layer, the nanocrystalline surface layer microstructure and phase transformation, and their effects on nanocrystalline surface were studied. It is shown that better interface bond can be obtained and nanocrystalline surface having the best property can be obtained after annealing at 350?℃. The hardness of nanocrystalline surface is up to HV 290 and the wear resistance property is better than that of the matrix. The precipitation of α phase from β′ phase can contribute to improving the property of Cu-Zn nanocrystalline surface layer
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2002年第4期687-692,共6页
The Chinese Journal of Nonferrous Metals
关键词
铜基复合材料
纳米表层面
耐磨性
相变
nanocrystalline surface layer
composites
wear resistance
phase transformation
