کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1620478 1005735 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High pressure phase-transition, elastic and thermal properties of uranium chalcogenides: A model study
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
High pressure phase-transition, elastic and thermal properties of uranium chalcogenides: A model study
چکیده انگلیسی

Uranium chalcogenides crystallize in Fm3¯m space group at ambient condition and transform to Pm3¯m space group under pressure. We have investigated the elastic and thermo-physical properties of uranium mono-chalcogenides using modified charge-transfer potential model. This model incorporates long-range Coulomb effects and charge-transfer (Coulomb screening due to f-electrons of U) effect modified by covalency and short-range repulsive interaction extended up to next-nearest neighbours. This model is capable of explaining the Cauchy-discrepancy. Calculated values of the phase-transition pressure (PT = 79.50, 19.60 and 9.50 GPa) and relative volume collapse (4.69, 7.95 and 7.88%) are in good agreement with experimental data. The equation of state has been plotted to get phase diagram.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 499, Issue 1, 4 June 2010, Pages 90–97
نویسندگان
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