Diffusion in the L12 ordered structure: A Monte Carlo study

M. Athènes, P. Bellon

Research output: Contribution to journalArticle

Abstract

Diffusion in L12 structure is investigated by means of atomistic kinetic Monte Carlo simulations on a rigid lattice. We observe that two diffusion mechanisms resulting from the interactions of vacancies with antisites located on both sublattices allow for the displacement of the minority element and can enhance the diffusivity of the majority element. The respective contributions to the diffusion process of these two mechanisms depend on temperature and on the deviation from the stoichiometric composition. They can explain the minimum of nickel diffusivity experimentally observed around the stoichiometic composition in Ni3Al and the suspected lower activation energy for gallium than for nickel in Ni3Ga.

Original languageEnglish (US)
Pages (from-to)441-446
Number of pages6
JournalDefect and Diffusion Forum
Issue number194-199 PART 1
StatePublished - Jan 1 2001

Keywords

  • L1 Ordered Phase
  • Monte-Carlo (MC) Simulation
  • Tracer Diffusion
  • Vacancy Diffusion Mechanism

ASJC Scopus subject areas

  • Metals and Alloys

Fingerprint Dive into the research topics of 'Diffusion in the L1<sub>2</sub> ordered structure: A Monte Carlo study'. Together they form a unique fingerprint.

  • Cite this