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 language | English |
|---|---|
| Pages (from-to) | 417-423 |
| Number of pages | 7 |
| Journal | Intermetallics |
| Volume | 12 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2004 Apr |
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