کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5435916 1509541 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The atomistic mechanism of fast relaxation processes in Cu65Zr35 glass
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
The atomistic mechanism of fast relaxation processes in Cu65Zr35 glass
چکیده انگلیسی

Molecular-dynamics simulations of the glass Cu65Zr35 show a rattling mode of atomic motion. While the frequency of the rattling mechanism is essentially independent of temperature and of the strain applied to the glass, the fraction of atoms undergoing rattling is dependent on temperature and strain. It is argued that the rattling motions constitute the 'fast processes' that lie between β relaxation and the boson peak in the characteristic spectrum of dynamic modes in glasses. It is concluded that the fast processes are a precursor to β relaxation and that their inhomogeneous distribution in the metallic glass is the origin of the shear transformation zones governing the onset of plastic flow.

The time evolution of a representative atom's coordinates x, y and z, demonstrating rattling motion at 300 K.271

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 135, 15 August 2017, Pages 290-296
نویسندگان
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