摘要
采用复合粉末加压成型的方法,成功制备了纳米Cu-Zn合金-Cu复合材料,获得了具有纳米结构表面层的铜基复合材料。对纳米表面层的微观结构、基体与表面的界面结构和相变特征及其对材料表面性能的影响进行了深入研究。实验结果表明,纳米表面层与基体结合良好,纳米表面层在经350℃左右退火,摩擦表面上形成了一层几乎覆盖整个摩擦表面的薄而连续的致密表面膜,该摩擦表面膜的存在,使复合材料的耐磨性和承载能力大幅度提高,耐磨性明显优于基体材料。
Copper-matrix composites with Cu-Zn nanocrystalline surface layer are obtained by using composite powder com-pacting process.The interface between matrix and surface layer,nanocrystalline surface layer microstructure and phase transformation,and their effects on nanocrystalline surface are studied.It is shown that better interface bond can be ob-tained and nanocrystalline surface having the best property can be obtained after350℃annealing.The350℃annealed tribo-surface film is found on worn surface of nanocrystalline surface layer,it covers almost entire worn surface and make wear resistance and load capability have a great increase.
出处
《汽车工艺与材料》
2002年第8期34-37,共4页
Automobile Technology & Material
关键词
纳米表面层
复合材料
耐磨性
表面膜
nanocrystalline surface layer
composites
wear resistance
phase transformation
