摘要
机械合金化可使室温下几乎不互溶体系Cu_xFe_(100-x)形成过饱和固溶体fcc相区的固溶度范围扩展到x>35 at-%.对Cu_(40)Fe_(60)进行的高分辨电镜观察表明:球磨3h后bcc相与fcc相之间存在N-W关系,即<001>α∥<110>γ。,<110>α∥<111>γ,表明在球磨的过程中发生了逆马氏体相变,fcc相区的扩展与此密切相关.球磨60h后形成了尺寸比较均匀的纳米晶结构.高分辨电镜同时观察到了粒子的破断。
Supersaturated solid solutions have been obtained by mechanical alloying inCu-Fe system which are immiscible at room temperature. The fcc phase range has been ex-tended to x>35 at.-% Cu. High resolution electron microscope images show that thereexist N-W orientation relationship,i.e. < 001 > α//<110>γ and < 110 > α// < 111 > γbetween bcc phase and fcc phase after 3h milling. It is quite possible that inverse martensitictransformation has occurred during mechanical alloying and the extension of fcc phase rangeclosely relates to this transformation. The fracture and refinement of particles, and cold-weld-ing images were also observed by using a high resolution electron microscope. After 60h me-chanical alloying, homogenous nanocrystals with particle size about 10 nm formed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第12期B545-B552,共8页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
Cu-Fe系
机械合金化
电镜观察
Cu-Fe
mechanical alloying
high resolution electron microscope
supersaturated solid solution
martensitic transformation
