Abstract
This chapter reviews the fabrication routes, applications, properties, and temperature limitations of fiber-reinforced ceramics. The development of fiber-reinforced ceramics has been prompted by the need for materials that have the advantages of ceramics combined with increased toughness and strength and a reduced variability of strength. A very considerable increase in the amount of research and development carried out on ceramic matrix-fiber composites (CMC) began in the early 1980s. All successful techniques for the manufacture of CMC require processing at temperatures of the order of 1000°C and above. The main demand for the development of CMC has been the requirement for higher temperature materials, particularly in aerospace applications, as components of gas turbine engines, for rocket motors, and for hot spots on spacecraft reentering the atmosphere. The strain to the failure of a ceramic matrix is usually less than that of the reinforcing fiber and, on loading, the matrix of the composite can crack at loads lower than the ultimate load. The main practical temperature limitation on CMC is because of the lack of available ceramic fibers with good properties above the range 1000°–1200°C.
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More From: Concise Encyclopedia of Advanced Ceramic Materials
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