Phase separation of BCC phase in the Co-rich portion of Co-Fe-Al system

N. Kamiya, T. Sakai, R. Kainuma, I. Ohnuma, K. Ishida

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The α(A2)+ α′(B2) and γ(A1)+ α′(B2) phase equilibria, and the A2/B2 and the ferromagnetic/paramagnetic transitions in the Co-rich portion of Co-Fe-Al system were examined by electron probe microanalysis (EPMA) and differential scanning calorimetric (DSC) measurement. The α(A2)+ α′(B2) two-phase region appears in the Co-rich side of the isothermal section even at high temperatures over 800 °C and a kind of LCST (Lower Critical Solution Temperature)-type phase separation is detected in the Co-30at.%Fe-Al section. Since this phase separation occurs in the compositional range in the vicinity of the intersection of the A2/B2 order-disorder and the magnetic transition boundaries, it seems that the formation of the LCST-type separation results from the enhancive interaction between the chemical ordering and magnetic ordering.

Original languageEnglish
Pages (from-to)417-423
Number of pages7
JournalIntermetallics
Volume12
Issue number4
DOIs
Publication statusPublished - 2004 Apr 1

Keywords

  • A. Aluminides, miscellaneous
  • B. Order/disorder transformations
  • B. Phase diagram
  • B. Phase transformations
  • D. Defects: antiphase domains

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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