Heat load behaviors of plasma sprayed tungsten coatings on copper alloys with different compliant layers

被引:35
作者
Chong, F. L. [1 ]
Chen, J. L. [1 ]
Li, J. G. [1 ]
Hu, D. Y. [2 ]
Zheng, X. B. [2 ]
机构
[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200051, Peoples R China
基金
中国国家自然科学基金;
关键词
D O I
10.1016/j.jnucmat.2007.11.008
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Plasma sprayed tungsten (PS-W) coatings with the compliant layers of titanium (Ti), nickel-chromium-aluminum (NiCrAl) alloys and W/Cu mixtures were fabricated on copper alloys, and their properties of the porosity, oxygen content, thermal conductivity and bonding strength were measured. High heat flux tests of actively cooled W coatings were performed by means of an electron beam facility. The results indicated that APS-W coating showed a poorer heat transfer capability and thermo-mechanical properties than VPS-W coating, and the compliant layers improved W coating performance under the heat flux load. Among three compliant layers, W/Cu was the preferable because of its better effects on heat removal and stress alleviating. The optimization of W/Cu compliant layer found that 0.1 mm. and 25 vol.%W was optimum compliant layer structure for I mm W coating, which induced a 23% reduction of the maximum stress compared to the sharp interface, and the plastic strain was reduced to 0.01% from 1.55%. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:213 / 217
页数:5
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