CNTs/Cu复合材料的抗电弧烧蚀特性
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摘要
通过对电弧截流现象和阴极斑点特性的分析,研究了碳纳米管铜复合材料(CNTs/Cu)在真空电弧放电过程中的抗电弧烧蚀性能。结果表明:随着CNTs含量的增加,复合材料的截流值逐渐降低,电弧寿命逐渐延长,烧蚀斑点更加分散、细小,烧蚀面积减小;CNTs/Cu复合材料的阴极斑点主要集中在正对阳极的阴极表面,且选择性地发生在Cu相上;抗电蚀性较好的CNTs呈网络状分布起到骨架作用,减少了液体铜的飞溅。因此, CNTs的加入可以有效地提高Cu基复合材料的电弧稳定性,使其抗电弧烧蚀能力得到增强。
The arc ablation resistance of carbon nanotube copper composites(CNTs/Cu) during vacuum arc discharge was studied by analyzing the arc current chopping and cathode spot characteristics. The results show that, with the increase of CNTs content, the chopping value of the composites decreases gradually and the arc life prolongs. The ablation spots become more dispersed and smaller, and the ablation area decreases. The cathode spots of CNTs/Cu composites are mainly located on the cathode surface of the positive anode, and it selectively occurs on the Cu phase. The CNTs with good corrosion resistance is distributed in the form of network, which plays a skeleton role in reducing the splash of liquid copper. Therefore, the arc stability of Cu matrix composites can be effectively improved and the arc ablation resistance can be enhanced with the addition of Cu.
The arc ablation resistance of carbon nanotube copper composites(CNTs/Cu) during vacuum arc discharge was studied by analyzing the arc current chopping and cathode spot characteristics. The results show that, with the increase of CNTs content, the chopping value of the composites decreases gradually and the arc life prolongs. The ablation spots become more dispersed and smaller, and the ablation area decreases. The cathode spots of CNTs/Cu composites are mainly located on the cathode surface of the positive anode, and it selectively occurs on the Cu phase. The CNTs with good corrosion resistance is distributed in the form of network, which plays a skeleton role in reducing the splash of liquid copper. Therefore, the arc stability of Cu matrix composites can be effectively improved and the arc ablation resistance can be enhanced with the addition of Cu.
引文
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[15]Lafferty J M,Cobine J D.Vacuum arcs:theory and application[M].Wiley,1980.
[2]Jüttner B.Cathode spots of electric arcs[J].Journal of Physics D Applied Physics,2001(34):103-123.
[3]朱世明,袁召,赵来军,等.真空电弧研究进展综述[J].电工材料,2012,40(1):38-43.
[4]Liu Y W,Zhang C Y,Qiao S G,et al.Characteristics of arc erosion for Cu-C composite materials in air[J].Modern Physics Letters B,2009,23(27):3281-3287.
[5]张程煜,乔生儒,杨志懋,等.纯石墨和铜-石墨的阴极斑点与截流值研究[J].稀有金属材料与工程,2009,38(3):488-491
[6]杨鹏翱,张红波,易健,等.热处理对炭/炭-铜复合材料载流磨损行为的影响[J].材料科学与工艺,2015,23(5):38-42.
[7]盛永华,李力.碳纳米管在增强镁基复合材料方面的作用[J].热加工工艺,2011,40(6):103-105.
[8]田娟娟,李再久,张吉明,等.碳纳米管增强金属基复合材料摩擦学性能的研究进展[J].热加工工艺,2017,46(8):23-26.
[9]王娟,凤仪,张学斌,等.电流极性对CNTs/Ag/G复合材料接触电压降的影响[J].材料热处理学报,2008,29(4):43-47.
[10]许玮,胡锐,高媛,等.碳纳米管增强铜基复合材料的载流摩擦磨损性能研究[J].摩擦学学报,2010,30(3):303-307
[11]Xu W,Hu R,Li J S,et al.Effect of electrical current on tribological property of Cu matrix composite reinforced by carbon nanotubes[J].Trans.Nonferrous Met.Soc.China,2011,21(10):2237-2241.
[12]Xu W,Hu R,Zhang Y Z,et al.Tribological behavior with electric current of CNTs-Cu and Graphite-Cu composites[J].Trans.Nonferrous Met.Soc.China,2012,22(1):78-84.
[13]许玮,刘懿文,胡锐,等.Gra/Cu和CNTs/Cu复合材料的截流值与阴极斑点研究[J].稀有金属材料与工程,2011,40(9):1616-1620.
[14]Li C,Li Z B.Experimental study on arc duration under different atmospheres[J].Transaction on Electronics,2014,97(9):843-849.
[15]Lafferty J M,Cobine J D.Vacuum arcs:theory and application[M].Wiley,1980.