کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1483008 991585 2011 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the dependence of the properties of glasses on cooling and heating rates: I. Entropy, entropy production, and glass transition temperature
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
On the dependence of the properties of glasses on cooling and heating rates: I. Entropy, entropy production, and glass transition temperature
چکیده انگلیسی

The glass transition is theoretically described in terms of a generic non-equilibrium thermodynamics approach employing De Donder's structural order parameter method, appropriate expressions for the relaxation behavior of glass-forming systems and a simplified but qualitative correct model of glass-forming melts with one order parameter related to the free volume of the system. Employing this approach the behavior of a variety of thermodynamic quantities describing glass-forming systems in vitrification and devitrification processes is interpreted theoretically. The present paper is devoted to the computation of the entropy, the entropy production and the glass transition temperature in dependence on the cooling and heating rates, varying latter parameter in a broad interval. A comparison with experimental results is given and some further consequences and possible extensions are discussed briefly.

Research Highlights
► The dependence of vitrification processes on cooling and heating rates is studied.
► Cooling and heating rates are varied hereby in broad intervals.
► The conventional definition of the glass transition temperature is analyzed.
► Limits of validity and an extension of the Bartenev-Ritland equation are discussed.
► The behaviour of the entropy and entropy production in vitrification is investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 357, Issue 4, 15 February 2011, Pages 1291–1302
نویسندگان
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