کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9818315 | 1518778 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface and sub-surface oxidation of α-Cu-(17 at.%)Al(1 0 0) studied by X-ray photo-electron spectroscopy and low energy He+ scattering spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Surface and sub-surface oxidation of α-Cu-(17 at.%)Al(1 0 0) studied by X-ray photo-electron spectroscopy and low energy He+ scattering spectroscopy Surface and sub-surface oxidation of α-Cu-(17 at.%)Al(1 0 0) studied by X-ray photo-electron spectroscopy and low energy He+ scattering spectroscopy](/preview/png/9818315.png)
چکیده انگلیسی
In this study the initial stages of oxidation of the α-Cu-(17 at.%)Al(1 0 0) single crystal oriented alloy surface was investigated by X-ray photo-electron spectroscopy and low energy He+ scattering spectroscopy. It was found that oxygen adsorption can be divided in two sequential stages: (i) a fast process, up to 15-20 L exposure, in which oxygen adsorbs on the alloy's surface resulting mostly in the formation of Al-O chemisorbed bonds; and (ii) a slower process during which oxygen adsorbs forming Cu-O and Al-O chemisorbed bonds concurrent with diffusion of O to the sub-surface and Al segregation to the surface region. The surface oxidation rate is much higher than the sub-surface one. The rate of Al segregation increases with oxygen exposure and involves both surface and sub-surface regions. Annealing of the oxidized alloy surface results in a pronounced segregation of Al and formation of an aluminum oxide layer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 230, Issues 1â4, April 2005, Pages 413-418
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 230, Issues 1â4, April 2005, Pages 413-418
نویسندگان
T. Kravchuk, R. Akhvlediani, A. Hoffman,