Title: Advanced engineering materials at high temperatures

Authors: L. Cartz

Addresses: Marquette University, Milwaukee, Wisconsin, USA

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.

Keywords: carbon-carbon composites; ceramic-ceramic composites; corrosion; corrosive environments; flaw detection; silicon carbide; silicon nitride; sintering; high-temperature ceramics; engineering ceramics; nitrogen ceramics; ceramic coatings; zirconium dioxide; zirconia; non-oxide ceramics; ceramic toughening; microstructure.

DOI: 10.1504/IJMPT.1991.036639

International Journal of Materials and Product Technology, 1991 Vol.6 No.4, pp.287 - 306

Published online: 05 Nov 2010 *

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