摘要
以Cu、Cr和Zr粉末为原料,采用机械合金化法活化Cu-Cr-Zr复合粉末,然后对机械合金化后的粉末进行真空热压烧结制备Cu-Cr-Zr合金材料。利用X射线衍射仪分析机械合金化过程中粉末的物相;通过对合金抗弯强度、相对密度、导电率、显微硬度的测试和金相观察,研究了合金力学性能随温度的变化。结果表明,球磨促进了Cr和Zr在Cu中的固溶,并细化了各粉末的晶粒;随热压烧结温度的升高,其固溶度降低,提高了材料导电性,导致合金力学性能下降。
Using Cu, Cr and Zr powders as raw materials, Cu-Cr-Zr composite powders were activated by mechanical alloying （MA）, and the alloy materials were prepared by vacuum hot-pressing sintering. The phases of the powders during the mechanical alloying process were studied by XRD. The law of alloy＇s mechanical properties varying with the change of the temperature was investigated by flexural strength, relative density, conductivity, microhardness and metallograph observation. The results show that ball milling can promote the solid solution of Cr and Zr in Cu, and refine the grain size of the powders. With the increase of hot-pressing sintering temperature, the solid solution degree decreases, which can increase the materials＇ electric conductivity and decrease the mechanical performance.
出处
《热加工工艺》
CSCD
北大核心
2012年第6期14-17,共4页
Hot Working Technology
基金
上海市基础研究重点项目(09JC1404400)
