The effect of oxidation on the room temperature flexural strength of liquid phase sintered SiC with AlN and Er2O3 additives exposed to air between 1200°C and 1400°C, for up to 200 h, was investigated. After oxidation, the room temperature flexural strength of the material increased, and was dependent on exposure temperature. After 200 h exposure at 1200°C, 1300°C, and 1400°C, increases of approximately 2%, 10% and 40%, respectively, were obtained. The increase in the flexural strength was associated with the decrease of stress concentration induced by processing defects at the surface and/or a subsurface.
Get full access to this article
View all access options for this article.
References
1.
PROCHAZKAS.: in ‘Special ceramics 6’, (ed.PopperP.), 171-181; 1975, Stoke-on-Trent, UK, British Ceramic Research Association.
2.
FABERK. T. and EVANSA. G.: J. Am. Ceram. Soc., 1983, 66, C94 —C96.
3.
CUTLERR. A. and JACKSONT. B.: Proc. 3rd Int. Symp.: ‘Ceramic materials and components for engines’, (ed. V.. Tennery), 309-318; 1989, American Ceramics Society, Westerville, OH.
4.
PADTUREN. P. and LAWNB. R.: J. Am. Ceram. Soc., 1994, 77, 2518–2522.
5.
MITOMOM., KIMY.-W. and HIROTSURUH.: J. Mater. Res., 1996, 11, 1601–1604.
6.
PADTUREP.: J. Am. Ceram. Soc., 1994, 77, 519–523.
7.
KEPPELERM., REICHERH.-G., BROADLEYJ. M., THUMG., WIEDMANNI. and ALDINGERF.: J. EUr. Ceram. Soc., 1998, 19, 521–526.
8.
JOUZ. C., VIRKARA. V. and CULTERR. A.: J. Mater. Res., 1991,6, 1945–1949.
9.
KIMY.-W., MITOMOM. and NISHIMURAT.: J. Am. Ceram. Soc., 2001, 84, 2060–2064.
10.
KIMY.-W., MITOMOM. and NISHIMURAT.: J. Am. Ceram. Soc., 2002, 85, 1007–1009.
