Publication Date:
2012-12-11
Description:
Composites of ZrC – SiC with relative densities in excess of 98% were prepared by reactive hot pressing of ZrC and Si at temperature as low as 1600°C. The reaction between ZrC and Si resulted in the formation of ZrC 1− x , SiC , and ZrSi . Low-temperature densification of ZrC − SiC ceramics is attributed to the formed nonstoichiometric ZrC 1− x and Zr – Si liquid phase. Adding 5 wt% Si to ZrC , the three-point bending strength of formed ZrC 0.8 –13.4 vol% SiC ceramics reached 819 ± 102 MPa with hardness and toughness being 20.5 GPa and 3.3 MPa·m 1/2 , respectively.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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