کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10645163 | 999922 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phase transition and compressibility study of UOs2 under pressure
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
High-pressure X-ray diffraction studies on MgCu2 type phase of UOs2 have been carried out up to 36â¯GPa. The compound remains in its parent phase up to 12â¯GPa with bulk modulus 261â¯GPa. Beyond 12â¯GPa, a first order phase transformation is observed. The phase transition is sluggish in nature and completes at 20.1â¯GPa. The high-pressure phase is found to be a hexagonal cell with lattice parameters aâ¯=â¯3.013â¯Ã
and câ¯=â¯4.267â¯Ã
. Charge density calculations show that uranium tetrahedra in the lattice are responsible for the phase transition. The density of state plots at Fermi level, wherein a pseudogap originates at high pressures, confirms the existence of a high pressure phase and uranium site is found to contribute significantly to such changes in density of state. The retrievable high pressure phase is found to be the least compressible among uranium intermetallic compounds with bulk modulus of 366â¯GPa.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 511, 1 December 2018, Pages 312-317
Journal: Journal of Nuclear Materials - Volume 511, 1 December 2018, Pages 312-317
نویسندگان
Balmukund Shukla, G. Shwetha, N.R. Sanjay Kumar, N.V. Chandra Shekar,