کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1484969 991647 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enthalpy relaxation in hyperquenched glasses of different fragility
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Enthalpy relaxation in hyperquenched glasses of different fragility
چکیده انگلیسی

The enthalpy relaxation in hyperquenched (HQ) glasses with a wide range of fragilities is studied by performing annealing and differential scanning calorimetric (DSC) experiments. In this work, the enthalpy relaxation behavior of annealed HQ glasses is characterized in terms of the excess heat capacity (Cp,exc) given by the difference between the first and the second DSC measurements on the HQ glasses. The shape of the Cp,exc curves depends on the fragility of the glass system, which implies that during annealing the mechanism of the structural relaxation of the HQ strong systems differs from that of the HQ fragile systems. The details of the fragility dependence of the Cp,exc curves have been discussed in terms of the energy landscape and the structure of the liquids.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 354, Issue 17, 1 April 2008, Pages 1862–1870
نویسندگان
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