Evolution kinetics of interstitial loops in irradiated materials: A phase-field model

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

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10 Citations (Scopus)

Abstract

Interstitial loops are one of the principal evolving defects in irradiated materials. The evolution of interstitial loops, including spatial and size distributions, affects both vacancy and interstitial accumulations in the matrix, hence, void formation and volumetric swelling. In this work, a phase-field model describing the growth kinetics of interstitial loops in irradiated materials during aging is developed. The diffusion of vacancies and interstitials and the elastic interaction between interstitial loops and point defects are accounted in the model. The effects of interstitial concentration, chemical potential, and elastic interaction on the growth kinetics and stability of interstitial loops are investigated in two and three dimensions. It is found that the elastic interaction enhances the growth kinetics of interstitial loops. The elastic interaction also affects the stability of a small interstitial loop adjacent to a larger loop. The model predicts linear growth rates for interstitial loops that is in agreement with the previous theoretical predictions and experimental observations.

Original languageEnglish
Article number015011
JournalModelling and Simulation in Materials Science and Engineering
Volume20
Issue number1
DOIs
Publication statusPublished - 1 Jan 2012

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ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Computer Science Applications

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