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Ion Irradiation Induced Surface Composition Modulation in Equiatomic Binary Alloys
- Authors
- Kim, Byung-Hyun; Kim, Sang-Pil; Kang, Joonhee; Chung, Yong-Chae; Kim, Kyung-Suk; Lee, Kwang-Ryeol
- Issue Date
- Feb-2021
- Publisher
- Elsevier BV
- Keywords
- Equiatomic alloys; Ion bombardment; Ion irradiation; Molecular dynamics; Sputtering
- Citation
- Applied Surface Science, v.540, no. , pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- Applied Surface Science
- Volume
- 540
- Start Page
- 1
- End Page
- 7
- ISSN
- 0169-4332
- Abstract
- Composition modulation by Ar bombardment on the Co0.5Cu0.5 alloy and the CoAl B2 phase was investigated on atomic scale by molecular dynamics simulation. The Ar bombardment on alloys at 300 K revealed that this bombardment induces a surface composition modulation in the layer-by-layer mode. In both the Co0.5Cu0.5 alloy and the CoAl B2 phase, the element of higher-sputtering yield is accumulated on the top surface layer, whereas it is depleted in lower layers, which is puzzling in the framework the conventional sputtering theory. A phenomenological kinetic model derived from the MD simulation results considering both the rearrangement and the sputtering of the substrate atoms successfully demonstrated that the rearrangement of the substrate atoms plays a significant role in the observed composition modulation. © 2020 Elsevier B.V.
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Related Researcher
- Kim, Byung-Hyun
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY (DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING)