Erosion and Modifications of Tungsten-Coated Carbon and Copper Under High Heat Flux

作     者：刘翔 S.Tamura K.Tokunaga N.Yoshida 张斧 许增裕 葛昌纯 N.Noda 

作者机构：Southwestern Institute of PhysicsChengdu 610041China Research Institute for Applied MechanicsKyushu University6-1 Kasuga-parkKasugaFukuoka 816-8580Japan Laboratory of Special Ceramics and Powder MetallurgyUniversity of Science and Technology BeijingBeijing 100083China National Institute for Fusion ScienceTokiGifu 509-5292Japan 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2003年第5卷第4期

页      面：1887-1894页

核心收录：

学科分类：07[理学] 070204[理学-等离子体物理] 0702[理学-物理学] 

基　　金：Part of the work was supported by Core University Program of Ministry of Education Culture and Science Japan 

主　　题：plasma spraying tungsten coatings recrystallization plastic deformation erosion products 

摘      要：Tungsten-coated carbon and copper was prepared by vacuum plasma spraying (VPS) and inert gas plasma spraying (IPS), respectively. W/CFC (Tungsten /Carbon Fiber-Enhanced material) coating has a diffusion barrier that consists of W and Re multi-layers pre-deposited by physical vapor deposition on carbon fiber-enhanced materials, while W/Cu coating has a graded transition interface. Different grain growth processes of tungsten coatings under stable and transient heat loads were observed, their experimental results indicated that the recrystallizing temperature of VPS-W coating was about 1400 ℃ and a recrystallized columnar layer of about 30 μm thickness was formed by cyclic heat loads of 4 ms pulse duration. Erosion and modifications of W/CFC and W/Cu coatings under high heat load, such as microstructure changes of interface, surface plastic deformations and cracks, were investigated, and the erosion mechanism (erosion products) of these two kinds of tungsten coatings under high heat flux was also studied.