Modelling of tungsten sputtering by argon particle bombardment on a fuzzy surface

被引：7
作者：
Liu, D. H. [1 ]
Dai, S. Y. [1 ]
Nishijima, D. [2 ]
Yang, K. R. [1 ]
Chen, J. Y. [1 ]
Xu, Y. [3 ]
Wang, D. Z. [1 ]
机构：
[1] Dalian Univ Technol, Sch Phys, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Dalian 116024, Peoples R China
[2] Univ Calif San Diego, Ctr Energy Res, 9500 Gilman Dr, La Jolla, CA 92093 USA
[3] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China
来源：
NUCLEAR MATERIALS AND ENERGY | 2022年 / 31卷
基金：
中国国家自然科学基金;
关键词：
Tungsten; Fuzz; Porosity; Kinetic Monte Carlo; GROWTH;
D O I：
10.1016/j.nme.2022.101205
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The physical sputtering yield of a tungsten (W) fuzzy surface by argon (Ar) plasma bombardment was measured in the linear plasma device PISCES-B, which showed an evident reduction in the physical sputtering yield on the fuzzy surfaces in comparison with a smooth surface (Nishijima D. et al 2011 J. Nucl. Mater. 415 S96). In order to reproduce and explain this phenomenon, dedicated modelling of W physical sputtering on smooth and fuzzy surfaces by Ar bombardment has been performed with the three-dimensional kinetic Monte Carlo code SUROFUZZ. According to a measured porosity distribution, W fuzzy surface morphology is constructed in our simulation, on which physical sputtering, trapping and escaping of W atoms under Ar bombardment are simulated with SURO-FUZZ. Detailed comparison between simulation and experiment reveals that microscopic structures of W fuzzy nanofibers play a critical role in the trapping of W atoms and hence in the resulting physical sputtering yield. For the same porosity distribution, the simulated physical sputtering yields of W fuzzy surface morphology with shallow valleys are higher than the measured values, while W fuzzy surface structure with deep and narrow slots results in a lower physical sputtering yield compared to the experimental data. The good agreement between simulation and experiment can be attained for W fuzzy surface morphology with deep and relatively open recessions.
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页数：8
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