کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1481113 | 1510456 | 2013 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermodynamics of the Au49Ag5.5Pd2.3Cu26.9Si16.3 glass-forming alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The thermodynamic properties of Au49Ag5.5Pd2.3Cu26.9Si16.3, the best Au-based glass-former, were investigated using differential scanning calorimetry. The specific heats of the amorphous, undercooled liquid, and crystal phases and enthalpies of transformation were determined. The differences in enthalpy and entropy of the undercooled melt with respect to equilibrium crystalline phases were calculated. The thermodynamic fragility index (mT), introduced by Angell [1] in relation to the loss of entropy of the liquid phase on undercooling to the glass transition temperature, was derived and compared to fragility indexes of both metallic and conventional glass-formers; in particular with another gold alloy, Au77Ge13.6Si9.4. Furthermore it was correlated to the kinetic one obtained from dynamic measurements [2].
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 382, 15 December 2013, Pages 95-98
Journal: Journal of Non-Crystalline Solids - Volume 382, 15 December 2013, Pages 95-98
نویسندگان
G. Dalla Fontana, G.L. Fiore, L. Battezzati,