Microstructure changes of plasma spraying tungsten coatings on CFC after different temperature annealing

被引：2
|
作者：
Liu, X [1 ]
Tamura, S [1 ]
Tokunaga, K [1 ]
Yoshida, N [1 ]
Noda, N [1 ]
机构：
[1] SW Inst Phys, Chengdu 610041, Sichuan, Peoples R China
来源：
MATERIALS FOR ADVANCED ENERGY SYSTEMS AND FISSION AND FUSION ENGINEERING, PROCEEDINGS | 2003年
关键词：
annealing; VPS-W; diffusion barrier; recrystallization; tungsten carbide;
D O I：
10.1142/9789812705198_0020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Thermal behaviors of tungsten coating of 0.5 mm thick with multi-layers interface of tungsten (W) and rhenium (Re) coated on CFC (CX-2002U) substrate by vacuum plasma spraying (VPS) technique were examined by annealing with an electron beam thermal load facility between 1200 degreesC and 2000 degreesC. Change of the microstructure was observed and its chemical composition was analyzed by EDS after annealing. It was observed that remarkable recrystallization of VPS-W occurred above 1400 degreesC. The structure of the multi-layers of W and Re become obscure by the mutual diffusion of W, Re and C above 1600degreesC and finally disappeared after annealing at 2000 degreesC for one hour. Very hard tungsten carbides are formed at the interface above 1600 degreesC and they were broadening with increasing annealing temperature and time.
引用
收藏
页码：179 / 186
页数：8
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