Mechanical Properties and Ablation Behavior of Machinable ZrB2-SiC-BN Ceramics
2009 ◽
Vol 79-82
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pp. 2011-2014
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Keyword(s):
ZrB2-SiC-BN ultrahigh-temperature ceramic (UHTC) was fabricated by hot-pressing at 1800°C under 23MPa pressure of argon. Compared to ZrB2-SiC, the flexural strength of ZrB2-SiC-BN composite material was enhanced by adding 30% BN, and the fracture toughness showed a slight decrease, while the hardness decreased sharply. The addition of 30% BN also noticeably improved the machinability of the composites. Furthermore, ablation resistance tests were carried out using an oxyacetylene torch under subsonic conditions. Results indicated that a coherent compact scale of zirconium silicate was formed, which acted as an effective barrier against the inward diffusion of oxygen.
2012 ◽
Vol 512-515
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pp. 706-709
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2008 ◽
Vol 368-372
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pp. 1730-1732
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2008 ◽
Vol 368-372
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pp. 1758-1760
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Keyword(s):
2010 ◽
Vol 434-435
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pp. 173-177
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2010 ◽
Vol 658
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pp. 416-419
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2011 ◽
Vol 66-68
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pp. 1562-1567
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2010 ◽
Vol 658
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pp. 352-355
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Keyword(s):
2012 ◽
Vol 500
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pp. 629-633
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