کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10155788 1666362 2019 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly collective atomic transport mechanism in high-entropy glass-forming metallic liquids
ترجمه فارسی عنوان
مکانیسم حمل و نقل بسیار کاملی در مایعات فلزی با ظاهری بالا
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد شیمی مواد
چکیده انگلیسی
Quasielastic neutron scattering (QENS) has been used to study the atomic relaxation process and microscopic transport mechanism in high-entropy glass-forming metallic (HE-GFM) liquids. Self-intermediate scattering functions obtained from the QENS data show unusually large stretching, which indicates highly heterogeneous atomic dynamics in HE-GFM liquids. In these liquids, a group of atoms over a length scale of about 21 Å diffuses collectively even well above the melting temperature. However, the temperature dependence of diffusion process in one of the HE-GFM liquid is Arrhenius, but in the other HE-GFM liquid it is non-Arrhenius. Although the glass-forming ability of these HE-GFM liquids is very poor, the diffusion coefficients obtained from the QENS data indicate the long range atomic transport process is much slower than that of the best metallic glass-forming liquids at their melting temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 35, Issue 1, January 2019, Pages 44-47
نویسندگان
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