机械合金化制备Cu-0.5wt%Nb合金组织与性能的研究  

Microstructure and mechanical properties of copper-niobium alloy prepared by mechanical alloying

作　　者：雷若姗[1] 汪明朴[1] 郭明星[1] 李周[1] 曹玲飞[1] 陈畅[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《材料热处理学报》2007年第2期39-43,共5页Transactions of Materials and Heat Treatment

基　　金：国家高新技术发展"863"计划资助项目(2006AA03Z517);博士点基金(20040533069)

摘　　要：采用机械合金化法制备了Cu-0.5wt%Nb纳米弥散强化铜合金。通过金相、透射电镜观察了该合金粉末态、冷轧态及不同温度退火后合金的组织结构变化。通过测量该合金不同状态的硬度及相对电导率,实验结果表明,其冷轧态硬度较高(可达160kg/mm2),随退火温度升高硬度呈缓慢下降趋势;900℃退火后,硬度仍可达91kg/mm2,表明此合金抗高温软化性能较好。此外该合金相对电导率最高可达89%IACS,这进一步说明利用机械合金化法制备的Cu-0.5wt%Nb合金具有优越的综合性能。The Cu-0.5wt% Nb nano-particle dispersion strengthened copper alloy was prepared by mechanical alloying. The microstructure of the mechanically alloyed powders,the cold wiled and annealed oxygen-free copper and Cu-0.5wt% Nb alloy were investigated by OM and TEM. The hardness and conductivity of the alloy were measured. The results show that the hardness of the cold rolled alloy is relatively high （160kg/mm^2 ）, and with increasing annealing temperature,it decreases slowly to 91kg/mm^2 after annealed at 900℃. Such changes indicate that the alloy has a high resistance to softening at elevated temperature. The relative conductivity of the alloy can reach its maximum of 89 % IACS at 400℃, which indicates that the alloy has both good mechanical and electrical properties.

关 键 词：机械合金化 Cu-Nb合金 真空热压 退火 高强高导 

分 类 号：TG146.1[一般工业技术—材料科学与工程] TF123.1[金属学及工艺—金属材料]