Ion irradiation induced surface composition modulation in equiatomic binary alloys
- Title
- Ion irradiation induced surface composition modulation in equiatomic binary alloys
- Author
- 정용재
- Keywords
- Ion irradiation; Ion bombardment; Sputtering; Equiatomic alloys; Molecular dynamics
- Issue Date
- 2021-02
- Publisher
- ELSEVIER
- Citation
- APPLIED SURFACE SCIENCE, v. 540, Part 2, article no. 148103, page. 1-7
- 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.
- URI
- https://www.sciencedirect.com/science/article/pii/S0169433220328609?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/175747
- ISSN
- 0169-4332; 1873-5584
- DOI
- 10.1016/j.apsusc.2020.148103
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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