A study of dynamical regimes crossover and thermal conductivity change at grain growth in U3Si2 by phase-field modeling
Abstract
Nano-sized grain growth dynamics in U3Si2 as a promising candidate for accident tolerant fuel is studied at different temperatures by phase-field modeling. Temperature dependences of incubation time for grain nucleation are discussed. A crossover of dynamical regimes governed by a majority of different mechanisms of grain growth are revealed. Simulation results for grain size and growth dynamics relate well to experimental observations. Statistical analysis of grain size distributions at different scaling regimes is provided to verify their universal character. Analysis of the thermal conductivity change in a growing nano-sized grain structure of U3Si2 illustrates good agreement with theoretical predictions.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (8)
Cong Ma
Tianyuan Xin
The First Sub-Institute, Nuclear Power Institute of China 2 , Chengdu 610213,
Dmitrii O. Kharchenko
Institute of Applied Physics, National Academy of Sciences of Ukraine 3 , 58 Petropavlivskaya St., 40000 Sumy,
Vasyl O. Kharchenko
Institute of Applied Physics, National Academy of Sciences of Ukraine 3 , 58 Petropavlivskaya St., 40000 Sumy,
Lu Wu
Qing Hou
Institute of Nuclear Science and Technology, Sichuan University 1 , Chengdu 610064,
Baoqin Fu
Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University 1 , Chengdu 610064,
Irina O. Shuda
Department of Mathematical Analysis and Optimization Methods, Sumy State University 5 , 116 Kharkivska St., 40007 Sumy,