Abstract
Relaxation behavior of supersaturated vacancies in water-quenched and rapidly solidified B2 type CoAl and NiAl with the stoichiometric composition was studied by differential scanning calorimetry (DSC). In both CoAl and NiAl quenched from 1773 K, a single exothermic peak due mainly to the recovery of supersaturated vacancies appeared near 950 K. On the other hand, the exothermic peak was also observed in as-spun rapidly solidified CoAl and NiAl ribbons, and the temperature range of the peak was much broader than that of quenched-in bulks, suggesting that the peak in the rapidly solidified ribbons results from not only a single recovery process of vacancies but also those of some other lattice defects. TEM observation showed that a large amount of dislocations were introduced in the NiAl ribbon and that comparatively many voids as well as an amount of dislocations were introduced in the CoAl ribbon.
| Original language | English |
|---|---|
| Article number | S5.15 |
| Pages (from-to) | 535-540 |
| Number of pages | 6 |
| Journal | Materials Research Society Symposium Proceedings |
| Volume | 842 |
| Publication status | Published - 2005 |
| Event | 2004 MRS Fall Meeting - Boston, MA, United States Duration: 2004 Nov 29 → 2004 Dec 2 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering