Dynamic processes of altered layer formation on alloy subsurface: a Monte Carlo simulation for Cu-Pt alloys

Autor:	Kyung-youl Min, Ryuichi Shimizu
Rok vydání:	1995
Předmět:	Steady state Computer simulation Chemistry Monte Carlo method Alloy Mineralogy Surfaces and Interfaces engineering.material Condensed Matter Physics Molecular physics Surfaces Coatings and Films Ion Sputtering Materials Chemistry engineering Diffusion (business) Layer (electronics)
Zdroj:	Surface Science. 341:241-248
ISSN:	0039-6028
DOI:	10.1016/0039-6028(95)00686-9
Popis:	To understand the basic processes of altered layer formation in subsurface regions of an alloy, we studied the dynamic change of the composition profile in the altered layer by Monte Carlo simulation. The simulation was performed for Cu52Pt alloy under 3 keV Ar+ ion beam irradiation at an incident angle of 45°. Model of the simulation is based on the descriptions of three processes; cascade mixing, radiation-enhanced Gibbsian segregation (REGS) and radiation-enhanced diffusion (RED). In the simulation we used the experimental results for assessing the composition of the 1st atomic layer and of different values of the RED coefficient. The results have revealed that the coefficient D ≈ 3 × 10−16cm2/s is most appropriate, satisfying the mass balance law at steady state attained after an experimentally determined ion dose. Preferential sputtering of Cu atoms is confirmed in the initial stage of the sputtering, and the composition ratio of sputtered Cu and Pt atoms approaches that of the bulk as sputtering proceeds.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d3acfc9eaf040408b9be2feb1916bd31 https://doi.org/10.1016/0039-6028(95)00686-9 Zobrazit plný text záznamu Full Text from ScienceDirect