反应球磨烧结制备Al_2O_3/Cu复合材料的组织与性能  

Microstructure and Properties of Al_2O_3/Cu Composite Prepared by Reaction Milling Following Sintering

作　　者：刘贵民[1] 李斌[1] 闫涛[1] 郑晓辉[1] 丁华东[1] 

机构地区：[1]装甲兵工程学院装备再制造工程系,北京100072

出　　处：《机械工程材料》2015年第1期63-67,共5页Materials For Mechanical Engineering

基　　金：重点实验室基金资助项目(9140C850201110C85);"十二五"装备预先研究项目(51326020202)

摘　　要：以铜铝合金粉为原料,利用反应球磨并结合放电等离子烧结工艺制备了Al2O3/Cu复合材料,研究了球磨不同时间后合金粉的形貌、物相以及铝含量对复合材料组织与性能的影响。结果表明：铜铝合金粉球磨20h后,生成了粒径为2~5μm的类球状颗粒,Cu相衍射峰发生明显的宽化,在铜基体中原位生成了纳米α-Al2O3颗粒相;Al2O3颗粒的尺寸及其在基体中的分布与铝含量有关,随着铝含量增加,Al2O3颗粒逐渐长大、富集甚至团聚;复合材料的相对密度和导电率均随着铝含量的增加逐渐降低,显微硬度则逐渐升高;当铝的质量分数为0.7%时,复合材料具有最佳的综合性能。Taking Cu-Al alloy powder as raw materials,Al2O3/Cu composite was prepared by reaction milling and spark plasma sintering.The morphology and phases of alloy powders after milling were studied,as well as the effects of Al contents on microstructure and properties of the composite.The results show that the spheroid powder particles with the size of 2-5μm were generated after milling for 20 h,Cu phase diffraction peak exhibited obvious broad,andα-Al2O3nano-particles were generated in situ in Cu matrix.The size and distribution of Al2O3 particles were affected by Al contents,and Al2O3 particles gradually grew up,enriched and agglomeration with the increase of Al contents.Relative density and electrical conductivity of the composite decreased gradually with the increase of Al contents,but the microhardness increased.When the Al content was 0.7wt%,the composite owned the best overall properties.

关 键 词：反应球磨 AL2O3/CU复合材料 显微硬度 导电率 

分 类 号：TB333[一般工业技术—材料科学与工程]