摘要
采用机械合金化工艺制备Cu-xFe(x=1,2,4,质量分数/%)过饱和固溶体,研究时效对其硬度和导电性能的影响。X-ray衍射分析结果表明:机械合金化显著提高了Fe在Cu中的固溶度,Cu-4Fe复合粉末经32h球磨,Fe完全固溶于Cu基体中,此时Cu晶粒尺寸为20nm,点阵常数降低到0.3621nm。硬度和导电率测试结果表明:时效处理能促进过饱和固溶体发生分解,Cu-4Fe过饱和固溶体冷压成型压坯在400℃保温8h后显微硬度HV由时效前的175降低到96,电导率由35%IACS(国际退火铜标准)提高到60%IACS。
The effect of aging treatment on hardness and electrical conductivity of Cu-xFe（x= 1,2,4, mass fraction/%） supersaturated solid solutions prepared by mechanical alloying was investigated. The X-ray results showed that the solubility of Fe in Cu increased due to the internal strain and microstructural refinement caused by ball milling. The solubility of Fe in Cu can be extended to 4% after 32h ball milling. Meanwhile, the copper grain size and lattice parameter decreased to 20nm and 0. 3621nm respectively. The aging treatment can promote the decomposition of the supersaturated solid solution which decreased the hardness and improve the electrical conductivity. The microhardness of the cold press formed Cu-4Fe alloy powders decreased from 175 to 96, and the electrical conductivity increased from 35 %IACS（International Annealed Copper Standard） to 60 %IACS.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2008年第12期51-54,共4页
Journal of Materials Engineering
基金
南昌航空大学科研基金资助项目(EA200501145)
关键词
机械合金化
过饱和固溶体
时效
硬度
电导率
mechanical alloying
supersaturated solid solution
aging treatment
hardness
electrical conductivity
