Paper Title:
Mechanical Properties and Ablation Behavior of Machinable ZrB2-SiC-BN Ceramics
  Abstract

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.

  Info
Periodical
Advanced Materials Research (Volumes 79-82)
Edited by
Yansheng Yin and Xin Wang
Pages
2011-2014
DOI
10.4028/www.scientific.net/AMR.79-82.2011
Citation
H. T. Wu, W. G. Zhang, "Mechanical Properties and Ablation Behavior of Machinable ZrB2-SiC-BN Ceramics", Advanced Materials Research, Vols. 79-82, pp. 2011-2014, 2009
Online since
August 2009
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$32.00
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