Published online by Cambridge University Press: 15 February 2011
This paper presents a review of the current status of fibers and fiber coatings for intermetallic matrix composites (IMCs). The properties of commercial and developmental fibers are reviewed and their potential as reinforcements for various intermetallics discussed. The potential fibers for near-term IMC applications are SiC (both monofilament and tow), single crystal Al2O3 and YAG/Al2O3 eutectic monofilaments, and sol-gel derived Al2O3- mullite nanocomposite tow fiber. The chemical compatibility of these fibers with various intermetallic matrices is reviewed. The issues related to the coefficient of thermal expansion (CTE) mismatch between the fiber and the matrix, attaining optimum interfacial bond strength, and fiber damage during composite processing are addressed. The effectiveness and limitations of fiber coatings in accommodating various fiber-matrix incompabilities, both chemical and mechanical, are discussed.