Erosion and modifications of tungsten-coated carbon and copper under high heat flux

被引：0
|
作者：
Liu, X [1 ]
Tamura, S
Tokunaga, K
Yoshida, N
Fu, Z
Xu, ZY
Ge, GC
Noda, N
机构：
[1] SW Inst Phys, Chengdu 610041, Peoples R China
[2] Kyushu Univ, Appl Mech Res Inst, Fukuoka 8168580, Japan
[3] Univ Sci & Technol Beijing, Lab Special Ceram & Powder Met, Beijing 100083, Peoples R China
[4] Natl Inst Fus Sci, Gifu 5095292, Japan
来源：
PLASMA SCIENCE & TECHNOLOGY | 2003年 / 5卷 / 04期
关键词：
plasma spraying; tungsten coatings; recrystallization; plastic deformation; erosion products;
D O I：
暂无
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
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 1400degreesC and a recrystallized columnar layer of about 30 mum 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.
引用
收藏
页码：1887 / 1894
页数：8
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