Cu-Ag合金原位纤维复合材料的形变特征  

Deformation Characteristics of the Cu-Ag Alloy in situ Filamentary Composite

作　　者：宁远涛[1] 张晓辉[1] 吴跃军[1] 

机构地区：[1]昆明贵金属研究所,云南昆明650221

出　　处：《贵金属》2006年第3期1-6,共6页Precious Metals

基　　金：国家自然科学基金资助项目(No.50371031)。

摘　　要：制备了Cu-10Ag合金及其原位纤维复合材料,观察与研究了铸态和形变态合金及复合材料的显微结构。铸态合金由Ag沉淀、(Cu+Ag)共晶和Cu基体组成,其Ag相通过变形逐步形成纳米尺度Ag纤维,其平均直径可用真实应变η的幂指数d=d0·exp(-0.228η)拟合。复合材料的形变过程包含了滑移、孪生、位错增生与迁移以及Ag纤维与Cu基体间形成的共格位相关系和立方-立方协同形变机制。The Cu-10Ag alloy and the in situ filamentary composite based on the alloy were prepared. The microstructures of the alloy as cast and formed were observed and studied. The structure of the cast alloy consists of Ag precipitate, （Cu ＋ Ag） eutectic and Cu phase. Ag phase is transformed gradually into the nanometer scale Ag filaments through deformation. The average diameter（d） of Ag filaments can be fitted with an exponential function of the true strain η： d = d0·exp（-0.228η）. The deformation process of the composite contains mechanisms of sliding, twining, dislocation increasing and migrating, and cooperating deformation between Cu phase and Ag filaments conditioned by a coherent orientation relationship between them.

关 键 词：金属材料 复合材料 CU-AG合金 形变 

分 类 号：TG146.32[一般工业技术—材料科学与工程]