کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1891104 | 1533512 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Investigation of physical ageing effect in Se90In4Sn6 glass
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Investigation of physical ageing effect in Se90In4Sn6 glass Investigation of physical ageing effect in Se90In4Sn6 glass](/preview/png/1891104.png)
چکیده انگلیسی
Physical ageing effect in ternary Se90In4Sn6 glass has been detected, using differential scanning calorimeter (DSC), under the influence of Co60 γ-irradiation, natural storage, and both. The number of Lagrangian constraints per atom (nc) of the investigated Se90In4Sn6 glass comes out to be 2.9. This reveals that the studied material belongs to a floppy glass with under-constrained glassy network and hence one expects it to undergo physical ageing effect. It is observed that γ-irradiation increases the glass transition temperature Tg and the endothermic peak area A, which is directly related to the relaxation enthalpy loss. The estimated value of A of γ-irradiated glass is slightly higher than that of un-irradiated glass, indicating that thermodynamic equilibrium state of super-cooled liquid is still not reached and further storage is required. In addition, pure natural storage increases also the two ageing parameters (Tg and A) where the value of A is nearly four times greater than that of un-irradiated glass. This indicates that a significant natural ageing effect is evident in the studied glass and a structural relaxation process towards a more equilibrium state can be attained. Moreover, for γ-irradiated Se90In4Sn6 glass which has been aged for 8 years, a small increase in the A value is evident, which reveals that γ-irradiation modifies its covalent-bonded glass network towards thermodynamically equilibrium extrapolated states of super-cooled liquid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 112, July 2015, Pages 1-5
Journal: Radiation Physics and Chemistry - Volume 112, July 2015, Pages 1-5
نویسندگان
Omar A. Lafi, Mousa M.A. Imran, Hassan K. Juwhari, Ma'rouf K. Abdullah,