Influence of lithium and silicon coatings on tungsten erosion in arc plasma

doi:10.1016/j.jnucmat.2021.153146

HFCAS OpenIR

	Influence of lithium and silicon coatings on tungsten erosion in arc plasma
	Tang, Z. L.1,2,3; Zuo, G. Z.1 ; Li, C. L.1,4; Huang, M.1; Zhang, X. B.3; Hu, J. S.1,5
	2021-11-01
发表期刊	JOURNAL OF NUCLEAR MATERIALS
ISSN	0022-3115
通讯作者	Zuo, G. Z.(zuoguizh@ipp.ac.cn) ; Hu, J. S.(hujs@ipp.ac.cn)
摘要	Arc spots formed on a plasma-facing component (PFC) have a stunning resemblance with the arc spots formed on a cathode of a vacuum arc. Hence, in this paper, a laboratory-scale vacuum arc process is used to get a better understanding of the arc erosion process of the tungsten (W) material. The performance of lithium (Li) and silicon (Si) coatings in erosion mitigation of W material is analyzed. The virgin W substrate was eroded significantly by arc spots and numerous W droplets were ejected into the inter electrode plasma from cathode with velocity of tens m/s. However, the W substrates can be effectively protected by Li and Si coatings from arc erosion. Preferential formation of arc spots on the coatings is responsible for the arc erosion mitigation. Compared with the virgin W substrate, no ejection of W droplets from the cathode was observed in the cases of coatings. Li and Si droplets were accidently ejected from the cathode and the ejected droplets were rapidly ablated in the arc plasma. For the case of Si coating, the W substrate was slightly melted and eroded due to the arc spots formed on the coating. By contrast, no obvious melting and erosion were observed on the W substrate for the case of Li coating, which is possibly due to the vapor shielding effect of Li between the W substrate and arc spots. These results confirm coatings served as a sacrificial protective layer and can reduce tungsten surface erosion caused by arcs, which provides a new reference for protecting first wall materials in future fusion devices. (c) 2021 Elsevier B.V. All rights reserved.
关键词	Arc erosion Mitigation Tungsten Lithium coating Silicon coating Optical emission spectrum
DOI	10.1016/j.jnucmat.2021.153146
关键词[WOS]	CATHODE SPOTS ; COMPONENTS ; VOLTAGE ; ECTONS ; EAST
收录类别	SCI
语种	英语
资助项目	National Key Research and Develop-ment Program of China[2017YFA0402500] ; National Key Research and Develop-ment Program of China[2017YFE0301100] ; Na-tional Nature Science Foundation of China[11625524] ; Na-tional Nature Science Foundation of China[11775261] ; Na-tional Nature Science Foundation of China[11905138] ; Na-tional Nature Science Foundation of China[11905148] ; Na-tional Nature Science Foundation of China[11905254] ; Users with Excellence Program of Hefei Science Center CAS[2020HSC-UE010]
项目资助者	National Key Research and Develop-ment Program of China ; Na-tional Nature Science Foundation of China ; Users with Excellence Program of Hefei Science Center CAS
WOS研究方向	Materials Science ; Nuclear Science & Technology
WOS类目	Materials Science, Multidisciplinary ; Nuclear Science & Technology
WOS记录号	WOS:000686064900006
出版者	ELSEVIER
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/124342
专题	中国科学院合肥物质科学研究院
通讯作者	Zuo, G. Z.; Hu, J. S.
作者单位	1.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China 2.Hefei Comprehens Natl Sci Ctr, Inst Energy, Hefei 230031, Peoples R China 3.Huaibei Normal Univ, Coll Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China 4.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China 5.CAS Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Tang, Z. L.,Zuo, G. Z.,Li, C. L.,et al. Influence of lithium and silicon coatings on tungsten erosion in arc plasma[J]. JOURNAL OF NUCLEAR MATERIALS,2021,555.
APA	Tang, Z. L.,Zuo, G. Z.,Li, C. L.,Huang, M.,Zhang, X. B.,&Hu, J. S..(2021).Influence of lithium and silicon coatings on tungsten erosion in arc plasma.JOURNAL OF NUCLEAR MATERIALS,555.
MLA	Tang, Z. L.,et al."Influence of lithium and silicon coatings on tungsten erosion in arc plasma".JOURNAL OF NUCLEAR MATERIALS 555(2021).