| Title |
Reaction Synthesis of Annealed Ni-50at%Al Powder Compact |
| Authors |
조용재(Yong Jae Cho); 이한영(Han Young Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2011.49.10.790 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
intermetallics; annealing; microstructure; thermal analysis; ration synthesis |
| Abstract |
To reduce the heat released during intermetallic reaction, Ni-50at%Al powder compact has been previously annealed at several conditions before the reaction. The effects of the pre-annealing conditions on the reaction synthesis process have been investigated. Experimental results show that the heat released during the reaction synthesis decreased proportionally with increase of the pre-annealing temperature and duration time. The reaction duration period was significantly increased when the intermetallics were formed in the powder compact during the pre-annealing. This was attributed to the fact that the reaction occurred by solid-state diffusion between the un-reacted elemental atoms and that the NiAl3 phase formed predominantly during pre-annealing. |