Application of the phase-field method in predicting gas bubble microstructure evolution in nuclear fuels

Shenyang Hu, Yulan Li, Xin Sun, Fei Gao, Ram Devanathan, Charles H. Henager, Mohammad A. Khaleel

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Fission product accumulation and gas bubble microstructure evolution in nuclear fuels strongly influence their thermo- mechanical properties such as thermal conductivity, gas release, volume swelling and cracking, and hence fuel performance. In this paper, a general phase-field model is developed to predict gas bubble formation and evolution. Important materials processes and thermodynamic properties including the generation of gas atoms and vacancies, sinks for vacancies and gas atoms, elastic interaction among defects, gas re-solution, and inhomogeneity of elasticity and diffusivity are accounted for in the model. The results demonstrate the potential applications of the phasefield method in investigating: 1) heterogeneous nucleation of gas bubbles at defects; 2) effect of elastic interaction, inhomogeneity of material properties, and gas re-solution on gas bubble microstructures; and 3) effective properties from the output of phase-field simulations such as distribution of defects, gas bubbles, and stress fields.

Original languageEnglish
Pages (from-to)515-522
Number of pages8
JournalInternational Journal of Materials Research
Volume101
Issue number4
DOIs
Publication statusPublished - 28 May 2010

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Keywords

  • Defects
  • Gas bubble evolution
  • Gas re-solution
  • Nuclear fuel
  • Phase-field model

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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