Abstract
TiC-Ni 3Al composites containing about 50 vol. % metal are of interest for application in diesel engines. Processing studies have shown that the Ni-Al precursor type can have a considerable effect on the densification behavior and final mechanical properties. Several different metal powder combinations were examined that would react to produce Ni 3 Al. These included: NiAl + Ni; Al-30 Ni + Ni; Ni+Al+NiAl + Ni; and Ni + AI. Sintering behavior was acceptable for all types except when elemental Al was used. Those particular samples exhibited macroscopic cracking due to differential heating and shrinkage resulting from the highly exothermic reaction between the Ni and Al. While the other samples densified well, only the composites made from the NiAl + Ni combination had mechanical properties that were acceptable.
Original language | English |
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Pages (from-to) | 69-74 |
Number of pages | 6 |
Journal | Ceramic Engineering and Science Proceedings |
Volume | 25 |
Issue number | 3 |
State | Published - 2004 |
Event | 28th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States Duration: Jan 25 2004 → Jan 30 2004 |