摘要
通过粉末冶金的方法,制备了致密和较高强度的CNT/Al复合材料,并系统地研究了在制备粉末阶段时引入不同粒径的钛粉后,对复合材料的组织结构与力学性能的影响。结果表明,在一定范围内,钛颗粒尺寸与制备的CNT-Ti/Al复合材料力学性能成反比。当加入的钛颗粒粒径为80 nm时,CNT-Ti/Al复合棒材力学性能最佳。其主要原因包括两个方面:一是钛颗粒有助于碳纳米管的分散,同时自身作为一种第二相强化基体;二是制备过程的热反应,使复合材料组织中生成了一种核壳结构,极大地增强了其界面结合与碳纳米管的载荷转移。
CNT/Al composites were prepared by powder metallurgy with high density and strength,the effects of different sizes of titanium powder on microstructure and mechanical properties of the composites were systematically studied.The results show that mechanical properties of the CNT-Ti/Al composites are inversely proportional to the particle size of the Ti powders.The CNT-Ti/Al composite rod has best mechanical properties with added Ti powder with particle size of 80 nm.These results can be attributed to the Ti powder not only circumvents CNTs dispersion burden,but also plays as second phase particles that enhance the strength of matrix.Besides,owing to the heat reaction during the preparation process,a core-shell structure is formed,which improves the interface bonding and the load transfer efficiency of CNTs.
作者
吴姚莎
张亚民
王丽荣
石澎
张宁
刘孝青
Wu Yaosha;Zhang Yamin;Wang Lirong;Shi Peng;Zhang Ning;Liu Xiaoqing(Institute of Intelligent Equipment Manufacturing,Zhongshan Torch Polytechnic,Zhongshan Guangdong 528436,China;Gent Materials Surface Technology(Guangdong)Co.,Ltd.,Zhongshan Guangdong 528437,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第8期64-70,共7页
Heat Treatment of Metals
基金
广东省普通高校青年创新人才类项目(2018GkQNCX058)
中山市社会公益科技研发项目(2017B1138)。
关键词
碳纳米管
铝基复合材料
钛
组织结构
力学性能
carbon nanotube
aluminum matrix composites
Ti
microstructure
mechanical properties
