摘要
以纳米Al2O3颗粒、超细WC粉末、工业纯Cu粉末为原料,通过热挤压致密获得了超细WC/纳米Al2O3弥散强化铜基(WC-Al2O3/Cu)复合材料,研究了挤压态WC-Al2O3/Cu复合材料的微观组织及力学性能。结果表明:成分为5%WC-2%Al2O3/Cu和10%WC-2%Al2O3/Cu(质量分数)的两种原料粉末,经机械球磨、冷压、真空烧结和热挤压后,其相对密度均达到了99%以上,超细WC和纳米Al2O3强化相颗粒呈均匀弥散分布,具有很好的导电性及力学性能;其中,5%WC-2%Al2O3/Cu复合材料的综合性能更佳,其抗拉强度达到235.06 MPa,延伸率为15.47%,导电率可达85.28%IACS,软化温度不低于900℃。
The dispersion-reinforced Cu-based composites by ultrafine WC and nano-sized Al2O3 particles(WC-Al2O3/Cu)were obtained by hot extrusion densification using the nano-sized Al2O3 particles,ultrafine WC powders,and industrial pure copper powders as raw materials.The microstructures and performances of the extruded WC-Al2O3/Cu composites were investigated.In the results,the relative density of the 5%WC-2%Al2O3/Cu and 10%WC-2%Al2O3/Cu composites by mass is over 99%after mechanical milling,cold pressing,vacuum sintering,and hot extrusion.At this meantime,the ultrafine WC and nano-sized Al2O3 particles distribute homogenously in the Cu matrix,resulting in high mechanical strength and excellent electrical conductivity.The tensile strength,elongation,and electrical conductivity of 5%WC-2%Al2O3/Cu composites are 235.06 MPa,15.47%,and 85.28%IACS,respectively,and the softening temperature is above 900℃,showing a better comprehensive performances.
作者
张小红
申景园
孙宇
胡连喜
ZHANG Xiao-hong;SHEN Jing-yuan;SUN Yu;HU Lian-xi(Wuxi Institute of Technology,Wuxi 214121,China;School of Materials Science and Engineering,HarbinInstitute of Technology,Harbin 150001,Chain)
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2019年第6期422-427,共6页
Powder Metallurgy Technology
关键词
铜基复合材料
弥散强化
挤压致密
显微组织
力学性能
Cu-based composites
dispersion strengthening
extrusion densification
microstructure
mechanical properties
作者简介
通信作者:胡连喜,E-mail:hulx@hit.edu.cn。
