کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11031121 | 1646083 | 2019 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of high-energy mechanical milling on the FSDP-related XRPD correlations in Se-rich glassy arsenic selenides
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
The X-ray powder diffraction (XRPD) patterns related to the first sharp diffraction peak (FSDP) are registered for Se-rich AsxSe100-x glasses (5â¯â¤â¯xâ¯â¤â¯40), subjected to high-energy mechanical milling in a dry mode with 500 minâ1 rotational speed. The results are treated in terms of structural model assuming broad diffraction halos in the XRPD patterns appeared due to remnants of inter-planar “quasi-crystalline” correlations, disturbed by overlapping with diffuse halos originated from strongest inter-atomic correlations, in part, the nearest-neighbor correlations between cation-like atoms. Milling does not influence the FSDP in a vicinity of glassy Se (xâ¯<â¯20), while causes increase in the FSDP width ÎQ (the reduced correlation length L) in the glasses with 20â¯â¤â¯xâ¯<â¯40, these changes being ascribed to disturbed inter-planar arrangement in covalent-bonded network due to structural defects generated under attrition ball milling. Assuming contribution of the Ehrenfest diffraction from coordination spheres in the detected XRPD patterns, the latter is ascribed to broadening in the distribution of characteristic FSDP-related inter-atomic distances, thus testifying in a favor of more defective structure of milled glass.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 124, January 2019, Pages 318-326
Journal: Journal of Physics and Chemistry of Solids - Volume 124, January 2019, Pages 318-326
نویسندگان
Ya Shpotyuk, C. Boussard-Pledel, B. Bureau, P. Demchenko, J. SzlÄzak, J. Cebulski, Z. BujÅáková, P. Baláž, O. Shpotyuk,