摘要
采用粉末冶金工艺,分别制备了单一粒径TiB2颗粒和混杂粒径TiB2颗粒的TiB2/Cu复合材料,研究了TiB2颗粒混杂（2μm＋50μm）增强对TiB2/Cu复合材料微观组织和性能的影响。结果表明：在TiB2颗粒总含量一定的条件下,与单一粒径TiB2颗粒增强TiB2/Cu复合材料相比,TiB2颗粒混杂增强TiB2/Cu复合材料的综合性能明显提高;当2μm与50μm TiB2颗粒混杂配比为1∶2时,TiB2/Cu复合材料综合性能最佳,硬度和导电率分别为69 HB和85.3%·IACS,相对于2μm单一粒径TiB2颗粒增强TiB2/Cu复合材料的硬度和导电率分别提高了12.2%和4.8%;TiB2颗粒混杂粒径TiB2/Cu复合材料的增强作用来源于获得了均匀致密的微观组织,不同粒径TiB2颗粒在铜基体中更加弥散分布,使得混杂粒径的TiB2颗粒协同增强铜基体作用更加明显,综合性能明显提高。
TiB2/Cu composites reinforced with single size TiB2 particles and mixed size TiB2 particles were prepared by powder metallurgy process,respectively. Effects of mixed size TiB2 particles（ 2 μm ＋ 50 μm） on microstructure and properties of the TiB2/Cu composites were studied. The results show that when the total content of TiB2 particles is constant,the comprehensive properties of the TiB2/Cu composites reinforced with mixed size TiB2 particles are obviously better than those of the TiB2/Cu composites reinforced with single size TiB2 particles.When the mixed ratio of 2 μm and 50 μm TiB2 particles is 1∶ 2,the comprehensive properties of the 5. 0 vol% TiB2/Cu composites are the best,and its hardness and conductivity are 69 HB and 85. 3%·IACS,respectively,which increase by 12. 2% and 4. 8%,compared with the5. 0 vol% TiB2/Cu composites reinforced with 2 μm single size TiB2 particles. The reinforcing mechanism of the TiB2/Cu composites with mixed size TiB2 particles is that the microstructure of the composites becomes uniform and compact,and the distribution of TiB2 particles with different particle sizes in copper matrix is more homogeneous,so the synergistic effect of TiB2 particles with mixed particle size on strengthening copper matrix is more obvious,and the comprehensive properties of the composites are obviously improved.
作者
张胜利
宋克兴
国秀花
冯江
龙飞
梁淑华
ZHANG Sheng-li;SONG Ke-xing;GUO Xiu-hua;FENG Jiang;LONG Fei;LIANG Shu-hua(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan Key Laboratory of Non-Ferrous Materials Science and Processing Technology,Luoyang 471023,China;Collaborative Innovation Center of Nonferrous Metals,Henan Province,Luoyang 471023 4.School of Materials Science and Engineering,Xi＇an University of Technology,Xi＇an 710048,China;Chin)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2018年第8期7-13,共7页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(U1502274,51605146)
河南省科技攻关计划项目(172102410046)
广东省金属强韧化技术与应用重点实验室开放课题(GKL201601)
作者简介
张胜利（1992-），男，主要从事铜合金功能材料的研究，E-mail：slzhang92@163．com。;通信作者：宋克兴（1967-），男，教授，博导，E-mail：kxsong@haust．edu．cn。
