Thermal Performance and Microstructure of Vacuum Plasma Sprayed Tungsten Coatings under Cyclic Heat Load

	Thermal Performance and Microstructure of Vacuum Plasma Sprayed Tungsten Coatings under Cyclic Heat Load
	Zhu Xiaoyong 1; Luo Laima 1; Li Ping 1; Chen Junling 2; Luo Guangnan 2; Wu Yucheng 1
刊名	RARE METAL MATERIALS AND ENGINEERING
	2015
卷号	44
关键词	tungsten vacuum plasma spraying cyclic heat load microstructure intermediate layer
ISSN号	1002-185X
其他题名	Thermal Performance and Microstructure of Vacuum Plasma Sprayed Tungsten Coatings under Cyclic Heat Load
英文摘要	Tungsten coatings on copper substrate were prepared by vacuum plasma spraying (VPS). NiCrAl and W75Cu25 materials were selected as intermediate layers. The experiment result of cyclic heat load of electron beam with 5 MW/M-2 (heat flux) and 2 s pulse duration indicates that NiCrAl interlayer improves the thermal conduction of the coatings and reduces their thermal and residual stress. The specimen with W75Cu25 interlayer fails with a bad thermal performance because of fabrication problems. The microstructure characterization of the VPS-W coating shows that erosion crater and fine microcracks appear on the tungsten coating after cyclic heat load tests. And erosion crater has a coarse and loose microstructure. Local plastic deformation occurs in the coating because of thermal stress. Cracks originate from debonding of molten tungsten particles at high temperature. However, the crack propagation is constrained by local plastic deformation and pores in the tungsten coating.
资助项目	[National Magnetic Confinement Fusion Program]
语种	英语
CSCD记录号	CSCD:5551526
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/58327]
专题	中国科学院合肥物质科学研究院
作者单位	1.Hefei University of Technology 2.Hefei University of Technology 3.Hefei University of Technology 4.Institute of Plasma Physics, Chinese Academy of Sciences 5.Institute of Plasma Physics, Chinese Academy of Sciences 6.Hefei University of Technology
推荐引用方式 GB/T 7714	Zhu Xiaoyong,Luo Laima,Li Ping,et al. Thermal Performance and Microstructure of Vacuum Plasma Sprayed Tungsten Coatings under Cyclic Heat Load[J]. RARE METAL MATERIALS AND ENGINEERING,2015,44.
APA	Zhu Xiaoyong,Luo Laima,Li Ping,Chen Junling,Luo Guangnan,&Wu Yucheng.(2015).Thermal Performance and Microstructure of Vacuum Plasma Sprayed Tungsten Coatings under Cyclic Heat Load.RARE METAL MATERIALS AND ENGINEERING,44.
MLA	Zhu Xiaoyong,et al."Thermal Performance and Microstructure of Vacuum Plasma Sprayed Tungsten Coatings under Cyclic Heat Load".RARE METAL MATERIALS AND ENGINEERING 44(2015).