Effect of Ni-Al precursor type on fabrication and properties of TiC-Ni 3Al composites

T. N. Tiegs, F. C. Montgomery, P. A. Menchhofer

Research output: Contribution to journalConference articlepeer-review

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 languageEnglish
Pages (from-to)69-74
Number of pages6
JournalCeramic Engineering and Science Proceedings
Volume25
Issue number3
StatePublished - 2004
Event28th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States
Duration: Jan 25 2004Jan 30 2004

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