Abstract
Nickel aluminide matrix composites reinforced with continuous fibers, discontinuous fibers and particulates are attractive materials for high temperature structural applications. They possess excellent high temperature strength, good creep and oxidation resistance, as well as lower density than superalloys. A variety of alloys based upon Ni3Al have been successfully produced and are reported to have improved properties over stoichiometric Ni3Al. These alloys are all candidate matrix materials for intermetallic matrix composites. This paper provides a comprehensive overview of the recent development of nickel aluminide matrix composites. Various processing techniques such as hot pressing, diffusion bonding, hot extrusion, reactive sintering, and liquid infiltration have been employed to consolidate the composites. The interface compatibility between various reinforcements and nickel aluminide matrices are examined. Finally, the mechanical properties and the directions for future development of various nickel aluminide matrix composites are discussed.
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