形变Cu-Cr-Ag原位复合材料组织和性能  

Microstructure and Properties of Cu-Cr-Ag in-situ Composites

作　　者：刘克明[1,2] 陆德平[2] 周海涛[1] A.Atrens 邹晋[2] 杨艳玲[2] 

机构地区：[1]中南大学,湖南长沙410083 [2]江西省科学院江西省铜钨新材料重点实验室,江西南昌330029 [3]昆士兰大学

出　　处：《稀有金属材料与工程》2011年第11期1931-1935,共5页Rare Metal Materials and Engineering

基　　金：科技部国际科技合作计划(2006DFB53050);国家自然科学基金(50961006);江西省学科学术带头人基金(060009)

摘　　要：采用熔铸-中间热处理-形变工艺制备了形变Cu-7Cr及Cu-7Cr-0.07Ag原位复合材料,利用光学显微镜、扫描电镜、数字微欧计及液晶电子拉力试验机研究了Cu-7Cr及Cu-7Cr-0.07Ag合金的微观组织、力学性能和导电性能。结果表明,微量Ag的加入使Cu-7Cr合金铸态组织枝晶臂直径更小,相同应变量下形成的纤维更加细小均匀,材料的强度显著提高,电导率略有上升,延伸率小幅提高。Cu-7Cr and Cu-7Cr-0.07Ag in-situ composites were prepared by the cast and thermo-mechanical treatment process.The microstructure,mechanical properties and conductivity of the in-situ composites were investigated by optical microscope,scanning electronic microscope,tensile-testing machine and microhmmeter.Results indicate that the trace addition of Ag can refine primary Cr dendrites and deformed Cr fibre,which leads to a significant increase in strength and slight improvement in conductivity.At the same time,the Cu-7Cr-0.07Ag in-situ composite shows a little higher plasticity.

关 键 词：微量Ag添加 原位复合材料 微观组织 力学性能 电导率 

分 类 号：TB331[一般工业技术—材料科学与工程]