کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1448979 988688 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Computational analysis of the atomic size effect in bulk metallic glasses and their liquid precursors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Computational analysis of the atomic size effect in bulk metallic glasses and their liquid precursors
چکیده انگلیسی

The atomic size effect and its consequences for the ability of multicomponent liquid alloys to form bulk metallic glasses are analyzed in terms of the generalized Bernal’s model for liquids, following the hypothesis that maximum density in the liquid state improves the glass-forming ability. The maximum density that can be achieved in the liquid state is studied in the 2(N-1) dimensional parameter space of N-component systems. Computer simulations reveal that the size ratio of largest to smallest atoms are most relevant for achieving the maximum packing for N = 3–5, whereas the number of components plays a minor role. At small size ratio, the maximum packing density can be achieved by different atomic size distributions, whereas for medium size ratios the maximum density is always correlated to a concave size distribution. The relationship of the results to Miracle´s efficient cluster packing model is also discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 56, Issue 18, October 2008, Pages 5058–5065
نویسندگان
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