Effect of Fe on microstructures and vacuum arc characteristics of CuCr alloys

被引：34

作者：

Cao Weichan ^{[1
]}

Liang Shuhua ^{[1
]}

Zhang Xiao ^{[1
]}

Wang Xianhui ^{[1
]}

Yang Xiaohong ^{[1
]}

机构：

[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2011年 / 29卷 / 02期

基金：

中国国家自然科学基金;

关键词：

CuCr alloy; Cathode spot; Vacuum arc; Microstructure; CONTACT MATERIALS; CATHODE; SPOTS;

D O I：

10.1016/j.ijrmhm.2010.10.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to clarify the effect of Fe addition on vacuum arc characteristics of CuCr alloys, the CuCr50, CuCr45Fe5 and CuCr40Fe10 alloys were prepared by vacuum sintering and infiltrating, and the simulated electrical breakdown experiment was undertaken in a vacuum interrupter. The characteristics of the motion of vacuum arcs were analyzed by a digital high-speed video camera and the erosion morphology was characterized by a scanning electron microscope (SEM). The results show that Fe additions can strengthen the Cr phase, promote the first breakdown phase to transfer from Cr to Cu and increase the strength of the alloy breakdown voltage by 80%. Meanwhile, Fe additions can still retain the arc stability of CuCr50 alloys during the generation and extinguishing process, decrease the chopping current, and prolong the arc life. Furthermore, the characteristics of the split and motion of cathode spots on the surface of the CuCr40Fe10 alloy were improved, which prohibits the concentrated arc erosion. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：237 / 243

页数：7

共 19 条

[1]

Duan WX, 2005, RARE METAL MAT ENG, V34, P998

[2]

Feng Y, 2007, RARE METAL MAT ENG, V36, P929

[3] Work function engineering and its applications in ohmic contact fabrication to II-VI semiconductors [J].

Ghosh, B. .

APPLIED SURFACE SCIENCE, 2008, 254 (15) :4908-4911

[4] Field emission current and vacuum breakdown by a pointed cathode [J].

Hirata, Y. ;

Ozaki, K. ;

Ikeda, U. ;

Mizoshiri, M. .

THIN SOLID FILMS, 2007, 515 (09) :4247-4250

[5]

LAFFERTY JM, 1980, VACUUM ARCS THEORY A, pCH2

[6]

LI J, 2004, JINGJI TANSUO, P16

[7]

Wang J, 2001, T NONFERR METAL SOC, V11, P226

[8]

Wang Yaping, 1999, Proceedings of the CSEE, V19, P46

[9] Effect of the microstructure of electrode materials on arc cathode spot dynamics [J].

Wang, YP ;

Zhang, CY ;

Zhang, H ;

Ding, BJ ;

Lu, K .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2003, 36 (21) :2649-2654

[10]

WANG YP, 1998, THESIS XIAN JIAOTONG

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