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Simulation of Grain Growth and Pore Migration in a Thermal Gradient
Author(s) -
Tikare Veena,
Holm Elizabeth A.
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02365.x
Subject(s) - temperature gradient , materials science , monte carlo method , grain growth , porosity , thermal , rod , porous medium , chemical physics , grain size , thermodynamics , composite material , chemistry , physics , medicine , statistics , mathematics , alternative medicine , pathology , quantum mechanics
The Potts Monte Carlo simulation was used to simulate microstructural evolution in uranium dioxide fuel rods. During service, grain growth, pore migration, and thermal segregation of the pores and UO 2 occur in the rods in a thermal gradient. In this investigation, we developed a model which simulates simultaneous grain growth, pore migration, and thermal segregation of the pores and UO 2 in a temperature gradient. Grain growth in a thermal gradient was simulated using the Monte Carlo Potts model technique developed by Anderson, Srolovitz, and co‐workers. Pore migration was simulated using conserved dynamics with minimum‐energy exchanges at a finite temperature. A temperature gradient was introduced into the model via interfacial mobility gradient. Finally, thermal segregation of the pores and UO 2 was achieved by introducing a heat of migration term, Δ E t , which biased the motion of porosity to the high‐temperature region. The development of this model is described and the incorporation of the proper physics of pore migration and thermal segregation is discussed.