高能球磨Cu-Zr复合粉体的特性与压制烧结过程研究  

Characteristics and pressing-sintering process of Cu-Zr powder formed by high-energy ball milling

作　　者：刘敦伟[1] 吴玉程[1] 王德宝[1] 黄新民[1] 郑玉春[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2009年第11期1711-1715,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省自然科学基金资助项目(070414180);安徽省"十五"二期科技攻关资助项目(040020392);合肥市重点科技资助项目(20051004)

摘　　要：文章介绍了采用高能球磨法制备Cu-Zr复合粉体,采用SEM、XRD等方法研究粉体的机械合金化过程,并进一步研究了其冷压成形和烧结过程。结果表明:随着球磨时间的延长,一部分Zr固溶到Cu中,形成Cu-Zr过饱和固溶体,另一部分则与铜生成铜锆金属间化合物;粉体由片状转变为近球状,显微硬度逐渐增加;当球磨超过15 h后,复合粉体硬化,为了得到某一密度的压坯,需要更高的压制压力。Cu-Zr powders were prepared by high-energy ball milling the Cu and Zr elemental powders. The mechanical alloying process and the powder characteristics were studied by means of SEM and XRD and the pressing-sintering process of the milled powders was also preliminarily studied. The results indicate that during ball milling, Zr atoms and Cu atoms form supersaturated solid solutions and Cu-Zr alloy intermetallic compound. The morphology of the milled powders are of near ball shape different from the platelike shape of the powders at the early milled stage. Meanwhile, the microhardness of the milled powders increases with the milling time. As for the Cu-Zr powder ball milled for 15 hours, much higher pressure is required to obtain a higher pressing density duo to powder hardening in the ball milling process.

关 键 词：Cu-Zr复合粉体 高能球磨 结构演变 压制烧结 

分 类 号：TG135.1[一般工业技术—材料科学与工程]