Advanced engineering materials at high temperatures
by L. Cartz
International Journal of Materials and Product Technology (IJMPT), Vol. 6, No. 4, 1991

Abstract: Materials that are available at the present time for use as engineering components are highly limited in their performance at temperatures above about 1000°C in corrosive environments. There is probably no satisfactory material for service in air above 1400°C and there is only a restricted selection of materials in view including silicon nitride based materials, silicon carbide based materials, and carbon-carbon-silicon carbide composites. This article summarizes the findings of several recent workshops concerned with high-temperature engineering ceramics, and covers nitrogen ceramics, ceramic-ceramic composites, ceramic coatings, Zr0₂-based ceramics, non-oxide ceramics, ceramic toughening mechanisms, and the microstructure and processing of engineering ceramics. Progress towards improved ceramic properties is not automatic, and many severe problems remain. Developments are needed in: oxidation resistant coatings for carbon-carbon composites, and for super alloys; particulate dispersants of controlled morphology suitable for Si₃N₄-based and SiC-based materials; high-stability fibres with non-reactive interfaces in refractory matrices; sintering mechanisms of monolithic and of composite ceramics; other high-temperature materials such as borides, silicides, carbides; detection of small flaws in ceramics; data on the mechanical properties of ceramics at temperatures above 1400°C; other methods of preparation of ceramic microstructures; ceramic toughening mechanisms and their interactions.

Online publication date: Fri, 05-Nov-2010

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