کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7899641 1510348 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Elastic and structural properties of low silica calcium aluminosilicate glasses from molecular dynamics simulations
ترجمه فارسی عنوان
خصوصیات الاستیک و ساختاری شیشه های آلومینوسیلیکات کلسیم کم سیلیک از شبیه سازی های پویایی مولکولی
کلمات کلیدی
عینک آلومینو اسید سیلیکا کم شبیه سازی دینامیک مولکولی، ویژگی های مکانیکی، خواص سازه،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
The elastic constants and the structural of low silica calcium aluminosilicate glasses with a low content of silica (5-25 mol%) and [CaO]/[Al2O3] =2, are investigated using molecular dynamics simulations. In particular, their elastic constants are calculated using two methods: a standard approach at zero temperature and another method designed to work at finite temperature. We show that while they both reproduce qualitatively the experimental behavior, only the method taking temperature into account provides a quantitative agreement with the experimental values. Therefore, taking temperature into account in the determination of elastic constants seems necessary to give a satisfactory account of the mechanical properties of these materials. In accordance with the experimental results, our molecular dynamics calculations show values of elastic constants that decrease with increasing amount of silica in the vitreous network. Then, the structure of the glasses is analyzed in term of pair distribution functions, oxygen kinds, and the parameter of short-range order, and discussed in correlation with the available experimental data. An overall good agreement is obtained with the calculated structure and the experimental data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 499, 1 November 2018, Pages 142-152
نویسندگان
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