Tensile creep failures of Al{sub 2}O{sub 3}/SiC nanocomposite
- National Industrial Research Institute, Nagoya (Japan)
- Osaka Univ. (Japan); and others
The dispersion of ceramic particles with nanometer size into the ceramic matrix grains or grain boundaries gives rise to substantial improvements of the mechanical properties, particularly at high temperatures. However, creep performance, which is one of the most important mechanical properties for high temperature engineering materials has not been investigated for the ceramic nano-composite. This paper reports tensile creep performance of alumina dispersed with 17 vol% silicon carbide nanoparticles at 1200{degrees}C. Compared to the mono-lithic alumina, the nanocomposite exhibited excellent creep resistance. The minimum creep rate of the nanocomposite was about three orders of magnitude lower and the creep life was 10 times longer than those of the monolithic. The improved creep resistance is caused by intergranular silicon carbide nanoparticles which rotate and plunge into alumina grains as grain boundary sliding proceeds.
- OSTI ID:
- 96560
- Report Number(s):
- CONF-940416-; TRN: 95:005316-0042
- Resource Relation:
- Conference: 96. annual meeting of the American Ceramic Society (ACS), Indianapolis, IN (United States), 25-28 Apr 1994; Other Information: PBD: 1994; Related Information: Is Part Of Ceramic transactions: Advances in ceramic-matrix composites II. Volume 46; Singh, J.P.; Bansal, N.P. [eds.]; PB: 1065 p.
- Country of Publication:
- United States
- Language:
- English
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