Demonstrating the temperature gradient impact on grain growth in UO2 using the phase field method

Michael R. Tonks, Yongfeng Zhang, Xianming Bai, Paul C. Millett

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Grain boundaries (GBs) are driven to migrate up a temperature gradient. In this work, we use a phase field model to investigate the impact of temperature gradients on isotropic grain growth. GB motion in 2D UO2 polycrystals is predicted under increasing temperature gradients. We find that the temperature gradient does not significantly impact the average grain growth behavior because the curvature driving force is dominant. However, it does cause significant local migration of the individual grains. In addition, the temperature dependence of the GB mobility results in larger grains in the hot portion of the polycrystal.

Original languageEnglish (US)
Pages (from-to)23-28
Number of pages6
JournalMaterials Research Letters
Volume2
Issue number1
DOIs
StatePublished - Jan 1 2014

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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