摘要
采用粉末热压的方法制备了(Al63Cu25Fe12)p/A7075复合材料,颗粒均匀分布在复合材料中。准晶面清晰,颗粒内部反应轻微,经过挤压后复合材料的基体组织呈现出一定的流向分布。时效后有T(AlZnMgCu)沿着基体α(Al)晶界析出。与非连续陶瓷增强金属基复合材料相比,(Al63Cu25Fe12)p/A7075复合材料的时效行为有两个显著特点:一是复合材料在时效6小时达到硬度峰值,基体时效12小时达到峰值;二是复合材料的硬化速率和峰值均高于基体材料。
A novel （Al63Cu25Fe12） p/7075 composite materials is fabricated by powder hot-pressing. It is shown that quasicrystalline particle （of Al63Cu25Fe12） is equably dispersed in the composite. It is well-knit between the matrix and particle. The reinforced particles keep its original shape and disperse equivalently in the composites of （Al63Cu25Fe12） p/A7075 prepared by powder hot-pressing after hot extrusion. It existed little reaction on the boundary. The microstructure of the matrix occurred certain flux scattering. The T（AlZnMgCu） phase dispersed along the grain boundary of matrix metal α （Al）. Compared with the discontinuous ceramic particle reinforced composites, （Al63Cu25Fe12） p/A7075 has two outstanding characteristics. Firstly, the ageing peak of the composites occurred at 6 hours but for matrix alloy at 12 hours. Secondly, at the beginning of the ageing, the hardening speed and hardness of the （Al63Cu25Fe12） p/A7075 is higher than the 7075 matrix alloy.
出处
《江苏理工学院学报》
2008年第2期82-86,共5页
Journal of Jiangsu University of Technology
