Concentration overshooting caused by compositional relaxation in a one-dimensional BCC binary model alloy: A computer simulation on microscopic master equations

Long Qing Chen, Qiang Wang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Using the microscopic master equation in point- and pair-approximations with nearest neighbor interaction, the compositional relaxation of concentration profile of the modulated materials has been studied above the critical spinodal instability temperature(Tc = 1.75unit) in a model bcc binary alloy. Based on the results obtained and discussion, we make the following conclusions: (1) concentration overshooting has been observed in the microscopic master equation simulation with both point- and pair-approximation simulations. This is consistent with the previous indications from the Cahn-Hilliard continuum equations and path probability method(PPM); (2) the magnitude of the overshooting is a monotonically decreasing function of temperature; (3) the composition profiles calculated from both the point- and pair-approximations are similar.

Original languageEnglish (US)
Pages (from-to)1113-1118
Number of pages6
JournalScripta Materialia
Volume39
Issue number8
DOIs
StatePublished - Sep 15 1998

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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