Effect of the microstructure of electrode materials on arc cathode spot dynamics

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	Effect of the microstructure of electrode materials on arc cathode spot dynamics
	Y. P. Wang; C. Y. Zhang; H. Zhang; B. J. Ding; K. Lu
	2003
发表期刊	Journal of Physics D-Applied Physics
ISSN	0022-3727
卷号	36 期号:21 页码:2649-2654
摘要	The role of the microstructure of cathode materials in the geometrical parameters and dynamic processes of cathode spots is studied on the basis of investigation of the microscopic traces of vacuum arcs without an external magnetic field. The arc erosion pattern shows that spot craters locate on the phases with weak voltage withstanding, whose size, morphology and distribution determine those of the arc spots. The spot tracks over the cathode alloys with ultra-fine microstructure disperse to a greatly increased electrode area, suggesting that the spot motion is controlled by the microstructure of the electrode materials. A proposed spot dynamics model infers that the spot velocity may increase by two orders when the typical microstructure scale is less than a characteristic value, i.e. the spot fragment size. It is concluded that the microstructure, including the constituent phases and their size, is an important factor dominating the microscopic migration mechanism of arc cathode spots.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. xian jiaotong univ, sch sci, dept mat phys, xian 710049, peoples r china.;wang, yp (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
关键词	Cucr Contact Materials Vacuum Arcs Temperature Breakdown Strength Motion
URL	查看原文
WOS记录号	WOS:000186845900010
引用统计	被引频次：50[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36066
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. P. Wang,C. Y. Zhang,H. Zhang,et al. Effect of the microstructure of electrode materials on arc cathode spot dynamics[J]. Journal of Physics D-Applied Physics,2003,36(21):2649-2654.
APA	Y. P. Wang,C. Y. Zhang,H. Zhang,B. J. Ding,&K. Lu.(2003).Effect of the microstructure of electrode materials on arc cathode spot dynamics.Journal of Physics D-Applied Physics,36(21),2649-2654.
MLA	Y. P. Wang,et al."Effect of the microstructure of electrode materials on arc cathode spot dynamics".Journal of Physics D-Applied Physics 36.21(2003):2649-2654.