کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7994944 | 1516162 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural, electronic, elastic, vibrational and thermodynamic properties of U3Si2: A comprehensive study using DFT
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Uranium silicide compound is a promising candidate as low enriched uranium nuclear fuel in light water reactors. Here we report a comprehensive study on structural, electronic, elastic, vibrational and thermodynamic properties of U3Si2 using plane wave based density functional theory. The electron-ion interaction and exchange-correlation energy terms have been described by projected-augmented wave method and generalized gradient approximation scheme, respectively. The relativistic corrections to the total energy have been accounted by incorporating the spin-orbit interactions in the total energy calculations. The results showed good agreement between the experimental and theoretical lattice parameters. The electronic structure of U3Si2 compound suggests significant contribution from the 5f and 3p orbitals of U and Si atoms at the Fermi energy level, respectively. The formation energy (ÎfH) of U3Si2 at 0 K, after zero point energy correction, have been estimated to be â37.40 kJ/mol. Elastic property calculation of U3Si2 showed mechanical stability and anisotropy at ambient pressure. In addition, the phonon calculation showed that U3Si2 is dynamically unstable. The temperature dependent thermodynamic properties of U3Si2 have also been evaluated using the phonon density of states.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 732, 25 January 2018, Pages 160-166
Journal: Journal of Alloys and Compounds - Volume 732, 25 January 2018, Pages 160-166
نویسندگان
D. Chattaraj, C. Majumder,