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Strong ZrB2- SiC- WC Ceramics at 1600°C.
- Source :
- Journal of the American Ceramic Society; Mar2012, Vol. 95 Issue 3, p874-878, 5p, 2 Black and White Photographs, 1 Chart, 1 Graph
- Publication Year :
- 2012
-
Abstract
- High temperature flexural strength of ZrB<subscript>2</subscript>-20 vol% SiC ceramics ( ZS) up to 1600°C in high purity argon atmosphere was significantly improved by adding 5 vol% WC, but degraded when 5 vol% ZrC was added. ZrB<subscript>2</subscript>-20 SiC-5 WC ceramic ( ZSW) has a very high strength (mean ± SD) of 675 ± 33 MPa at 1600°C, and also an elastic and transgranular fracture mode was observed. According to the analysis of the fracture modes and crack origins in ZSW ceramics, the improvement in strength above 1000°C was attributed to the removal of the oxide impurities from grain boundaries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 95
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 72459469
- Full Text :
- https://doi.org/10.1111/j.1551-2916.2011.05062.x