کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5454423 | 1514162 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The high-temperature heat capacity of the (Th,U)O2 and (U,Pu)O2 solid solutions
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The enthalpy increment data for the (Th,U)O2 and (U,Pu)O2 solid solutions are reviewed and complemented with new experimental data (400-1773Â K) and many-body potential model simulations. The results of the review show that from room temperature up to about 2000Â K the enthalpy data are in agreement with the additivity rule (Neumann-Kopp) in the whole composition range. Above 2000Â K the effect of Oxygen Frenkel Pair (OFP) formation leads to an excess enthalpy (heat capacity) that is modeled using the enthalpy and entropy of OFP formation from the end-members. A good agreement with existing experimental work is observed, and a reasonable agreement with the results of the many-body potential model, which indicate the presence of the diffuse Bredig (superionic) transition that is not found in the experimental enthalpy increment data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 484, February 2017, Pages 1-6
Journal: Journal of Nuclear Materials - Volume 484, February 2017, Pages 1-6
نویسندگان
S.O. VÄlu, O. BeneÅ¡, D. Manara, R.J.M. Konings, M.W.D. Cooper, R.W. Grimes, C. Guéneau,