Kinetics of antiphase domain boundaries during an Ll2 order-disorder phase transformation: A monte carlo simulation

C. Abromeit, Syo Matsumura

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The formation of the LI2phase in an A3B intermetallic solid solution has been investigated by Monte Carlo simulation. The ordering is modelled with a simple atomic exchange mechanism based on a fee Ising model with appropriate values for the pairwise atomic interactions. It is shown that the ordering kinetics occurs on two time scales: nucleation and growth of ordered domains and the annealing of antiphase boundaries between the domains. The model is applied to the Ll2ordered Ni3Alphase under various irradiation conditions. It is demonstrated that the migration and annihilation of antiphase boundaries largely determine the time evolution of the Ll2 phase.

Original languageEnglish
Pages (from-to)2287-2302
Number of pages16
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Volume82
Issue number11
DOIs
Publication statusPublished - Jan 1 2002

Fingerprint

Ising model
Order disorder transitions
antiphase boundaries
Intermetallics
phase transformations
Solid solutions
Nucleation
Phase transitions
Irradiation
disorders
Annealing
atomic interactions
Kinetics
kinetics
intermetallics
solid solutions
simulation
nucleation
irradiation
annealing

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Metals and Alloys

Cite this

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abstract = "The formation of the LI2phase in an A3B intermetallic solid solution has been investigated by Monte Carlo simulation. The ordering is modelled with a simple atomic exchange mechanism based on a fee Ising model with appropriate values for the pairwise atomic interactions. It is shown that the ordering kinetics occurs on two time scales: nucleation and growth of ordered domains and the annealing of antiphase boundaries between the domains. The model is applied to the Ll2ordered Ni3Alphase under various irradiation conditions. It is demonstrated that the migration and annihilation of antiphase boundaries largely determine the time evolution of the Ll2 phase.",
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T1 - Kinetics of antiphase domain boundaries during an Ll2 order-disorder phase transformation

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N2 - The formation of the LI2phase in an A3B intermetallic solid solution has been investigated by Monte Carlo simulation. The ordering is modelled with a simple atomic exchange mechanism based on a fee Ising model with appropriate values for the pairwise atomic interactions. It is shown that the ordering kinetics occurs on two time scales: nucleation and growth of ordered domains and the annealing of antiphase boundaries between the domains. The model is applied to the Ll2ordered Ni3Alphase under various irradiation conditions. It is demonstrated that the migration and annihilation of antiphase boundaries largely determine the time evolution of the Ll2 phase.

AB - The formation of the LI2phase in an A3B intermetallic solid solution has been investigated by Monte Carlo simulation. The ordering is modelled with a simple atomic exchange mechanism based on a fee Ising model with appropriate values for the pairwise atomic interactions. It is shown that the ordering kinetics occurs on two time scales: nucleation and growth of ordered domains and the annealing of antiphase boundaries between the domains. The model is applied to the Ll2ordered Ni3Alphase under various irradiation conditions. It is demonstrated that the migration and annihilation of antiphase boundaries largely determine the time evolution of the Ll2 phase.

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