Effect of Fe on vacuum breakdown properties of CuW alloys

被引：37
作者：
Cao Weichan [1 ]
Liang Shuhua [1 ]
Gao Zhuangfeng [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 / 06期
基金：
中国国家自然科学基金;
关键词：
CuW alloy; Vacuum arc; Surface; Microstructure; WT.PERCENT-CU; DENSIFICATION; CATHODE; MICROSTRUCTURE; COMPOSITES; BEHAVIOR;
D O I：
10.1016/j.ijrmhm.2011.04.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
CuW alloys with different Fe additions were prepared by the infiltration method. The microstructures of the CuW alloys prepared were characterized by a transmission electron microscope (TEM). The effect of Fe content on the surface erosion morphology was observed by a scanning electron microscope (SEM). The distribution of cathode spots was analyzed by a digital high-speed video camera. The results show that Fe addition can improve the relative density and thermal conductivity of CuW alloy with less than 0.6 wt.% Fe. However, excessive Fe addition can deteriorate the relative density and thermal conductivity. TEM results show that Fe addition can promote the formation of CuW solution. The area and depth of the erosion pits on the surface of CuW alloy depend on the breakdown position. Fe addition can strengthen the interface bond of Cu and W, improve the arc stability and the division of the cathode spots and, thus, avoid the concentration erosion. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：656 / 661
页数：6
相关论文
共 22 条
[1]   Synthesis and densification of W-30 wt%Cu composite powders using ammonium meta tungstate and copper nitrate as precursors [J].
Ardestani, M. ;
Arabi, H. ;
Rezaie, H. R. ;
Razavizadeh, H. .
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2009, 27 (04) :796-800
[2]   Electroless deposition of Ni-Cu-P, Ni-W-P and Ni-W-Cu-P alloys [J].
Balaraju, JN ;
Rajam, KS .
SURFACE & COATINGS TECHNOLOGY, 2005, 195 (2-3) :154-161
[3]   Effect of Fe on microstructures and vacuum arc characteristics of CuCr alloys [J].
Cao Weichan ;
Liang Shuhua ;
Zhang Xiao ;
Wang Xianhui ;
Yang Xiaohong .
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2011, 29 (02) :237-243
[4]   Arc erosion behavior of a nanocomposite W-Cu electrical contact material [J].
Chen, W ;
Kang, ZY ;
Shen, HF ;
Ding, BJ .
RARE METALS, 2006, 25 (01) :37-42
[5]   Fabrication of W-20 wt.%Cu alloys by powder injection molding [J].
Cheng Jigui ;
Wan Lei ;
Cai Yanbo ;
Zhu Jinchuan ;
Song Peng ;
Dong Jie .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2010, 210 (01) :137-142
[6]   Effect of pre-reduced Cu particles on hydrogen-reduction of W-oxide in WO3-CuO powder mixtures [J].
Kim, DG ;
Min, KH ;
Chang, SY ;
Oh, ST ;
Lee, CH ;
Kim, YD .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 399 (1-2) :326-331
[7]   Effect of heating rate on microstructural homogeneity of sintered W-15wt%Cu nanocomposite fabricated from W-CuO powder mixture [J].
Kim, DG ;
Kim, GS ;
Suk, MJ ;
Oh, ST ;
Kim, YD .
SCRIPTA MATERIALIA, 2004, 51 (07) :677-681
[8]   The initial stage of sintering for the W-Cu nanocomposite powder prepared from W-CuO mixture [J].
Kim, DG ;
Kim, GS ;
Oh, ST ;
Kim, YD .
MATERIALS LETTERS, 2004, 58 (05) :578-581
[9]   Thermal conductivity of W-Cu composites at various temperatures [J].
Kim, YD ;
Oh, NL ;
Oh, ST ;
Moon, IH .
MATERIALS LETTERS, 2001, 51 (05) :420-424
[10]   Research on the densification of W-40 wt.%Cu by liquid sintering and hot-hydrostatic extrusion [J].
Li, Daren ;
Liu, Zuyan ;
Yu, Yang ;
Wang, Erde .
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2008, 26 (04) :286-289
123