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Mechanical properties and ablation behavior of machinable ZrB(2)-SiC-BN ceramics
Wu, H. T.; Zhang, W. G.
Conference Name2nd International Conference on Multi-Functional Materials and Structures
Source PublicationAdvanced Materials Research Volume: 79-82 Pages: 2011-2014
Conference DateOCT 09-12, 2009
Conference PlaceQingdao, PEOPLES R CHINA
PublisherTrans Tech Publications Ltd
AbstractZrB(2)-SiC-BN ultrahigh-temperature ceramic (UHTC) was fabricated by hot-pressing at 1800 degrees C under 23MPa pressure of argon. Compared to ZrB(2)-SiC, the flexural strength of ZrB(2)-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.
KeywordZirconium Diboride Silicon Carbide Boron Nitride Ablation Behavior Mechanical Properties Machinability High Temperature Ceramics Fabrication Composites
Indexed ByISTP
Document Type会议论文
Recommended Citation
GB/T 7714
Wu, H. T.,Zhang, W. G.. Mechanical properties and ablation behavior of machinable ZrB(2)-SiC-BN ceramics[C]:Trans Tech Publications Ltd,2009:2011-2014.
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