Enhanced arc erosion resistance of TiB2/Cu composites reinforced with the carbon nanotube network structure

被引:49
作者
Long, Fei [1 ,2 ,3 ]
Guo, Xiuhua [1 ,2 ,3 ]
Song, Kexing [1 ,2 ,3 ]
Jia, Shuguo [1 ,2 ,3 ]
Yakubov, Vladislav [4 ]
Li, Shaolin [1 ,2 ,3 ]
Liang, Shuhua [5 ]
机构
[1] Henan Univ Sci & Technol, Sch Mat Sci & Engn, Luoyang 471023, Peoples R China
[2] Henan Prov Key Lab Nonferrous Met Mat Sci & Proc, Luoyang 471023, Peoples R China
[3] Collaborat Innovat Ctr Nonferrous Met, Luoyang 471023, Henan, Peoples R China
[4] Univ S Florida, Dept Mech Engn, Tampa, FL 33620 USA
[5] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
TiB2/Cu-CNT electrical contact materials; Designing and tailoring microstructure; The CNT network structure; Arc erosion characteristics; Arc erosion mechanism; METAL-MATRIX COMPOSITES; CONTACT; BEHAVIOR; CONDUCTIVITY; FABRICATION; CATHODE;
D O I
10.1016/j.matdes.2019.108136
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The continuous network structure induced by carbon nanotubes (CNTs) was introduced to TiB2/Cu composites by electroless deposition, slurry dispersion and powder metallurgy to enhance arc erosion resistance. The arc erosion characteristics of the TiB2/Cu-CNT composites at a current ranging from 10 A to 20 A were investigated. The mechanisms of enhanced arc erosion resistance by the CNT network structure were elaborated based on microstructure and physical characteristics as well. The results show that with the introduction of continuous CNT network structure, arc energy was reduced by more than 83%, there were almost no fluctuation of arc energy and the welding force was relatively low at current above 15 A for TiB2/Cu-1.2 vol% CNT composite in comparison with the CNT unreinforced TiB2/Cu composite. The continuous network structure facilitated the cathode arc motion and dispersed the cathode arc, mitigating the concentrated deterioration of arc erosion. Simultaneously, CNTs could float much easily at the surface of molten pool to weaken the Cu splashing. The CNT network structure delayed the formation of the deeper crater on the cathode and the protrusion with a sharper tip on the anode. Furthermore, it could prevent the formation of cracks and fracture of anode protrusion. (C) 2019 Published by Elsevier Ltd.
引用
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页数:15
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