摘要
通过不同时间的湿法球磨得到不同粒径分布的Ti_(2)AlC粉末,再与Cu_(2)O粉末和铜粉末混合,利用放电等离子烧结技术制备TiC_(0.5)-Al_(2)O_(3)/Cu复合材料,研究了Ti_(2)AlC粉末粒径分布对其组织和性能的影响。结果表明:随着Ti_(2)AlC粉末中亚微米级颗粒体积分数由0增加到70.27%,复合材料中增强相颗粒TiC_(0.5)和Al_(2)O_(3)在基体中分散更均匀,但是当亚微米级颗粒体积分数为98.07%时,增强相颗粒出现聚集现象;随着亚微米级颗粒体积分数的增加,复合材料的导电率与相对密度先减小后增大,硬度与屈服强度则先升后降,当亚微米级颗粒体积分数为70.27%时,复合材料综合性能最优异。
Ti_(2)AlC powder with different particle size distribution was obtained by wet ball milling for different times,and then mixed with Cu_(2)O powder and copper powder to prepare TiC_(0.5)-Al_(2)O_(3)/Cu composite by discharge plasma sintering.The effect of particle size distribution of the Ti_(2)AlC powder on microstructure and properties of composites was studied.The results show that when the submicron particle volume fraction of the Ti_(2)AlC powder increased from 0 to 70.27%,the reinforcement particles TiC_(0.5)and Al_(2)O_(3)dispersed in the matrix more evenly;when the volume fraction of submicron particles was 98.07%,the reinforcement particles aggregated.With increasing the submicron particle volume fraction,the conductivity and relative density of the composites decreased first and then increased,while the hardness and yield strength increased first and then decreased.When the submicron particle volume fraction reached 70.27%,the composite had the best comprehensive performance.
作者
聂智超
严仰先
洪嘉婷
廖航宇
宋文龙
邹金明
张雪辉(导师)
NIE Zhichao;YAN Yangxian;HONG Jiating;LIAO Hangyu;SONG Wenlong;ZOU Jinming;ZHANG Xuehui(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China;Longnan Emergency Management Bureau,Longnan 341700,China;Jiangxi Advanced Copper Industry Research Institute,Yingtan 335000,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2023年第3期66-71,共6页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(51804138)
江西省自然科学基金资助项目(20202BAB204002,20192ACBL21013)
国家级大学生创新创业训练项目(202010407017,202110407012)。
