Trapping Process of Vacancies by Foreign Atoms

  • Sakagami Yoshirou
    Department of Physics, Faculty of Science, Science University of Tokyo
  • Yoshida Sho
    Department of Physics, Faculty of Science, Science University of Tokyo

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タイトル別名
  • Trapping Process of Vacancies by Foreig

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A trapping process of vacancies by foreign atoms in fcc crystals after quenching is examined as a relaxation process of a spacial distribution of vacancies. The distribution of vacancies is constructed on a coarse-grained lattice, and its evolution is described by Markov chains. A relaxation time of the system is calculated as a function of annealing temperatures and binding energies between a foreign atom and a vacancy, and is compaired with that calculated from the rate equation of Damask and Dienes type. The relation between the relaxation time and the trapping time is discussed. It is also shown that this model yields, in a stationary state, the same conclusion derived from a usual thermodynamical formula.

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