Hot Hardness Behavior of Yttrium Sialon Ceramics
- 1 October 1990
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 73 (10) , 2834-2838
- https://doi.org/10.1111/j.1151-2916.1990.tb06683.x
Abstract
The hot hardness of polycrystalline single‐phase α‐ or β‐ sialon ceramics declines with increasing temperature, but the measured Vickers hardness (HV1) at 1100°C is still about 1550 and 1300 for the α‐sialon and the low‐substituted β‐sialon materials, respectively. The hardness of ‘composite’β‐ or α‐β‐sialon ceramics containing a high volume fraction of glassy phase is lower at all temperatures and drops significantly above about 900°C.Keywords
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