Microstructure and Mechanical Properties of SiC Whisker-reinforced ZrB2 Ultra-high Temperature Ceramic
SiC whisker-reinforced ZrB2 matrix ultra-high temperature ceramic were prepared at 2000℃ for 1 h under 30MPa by hot pressing and the effects of whisker on flexural strength and fracture toughness of the composites was examined.The flexural strength and fracture toughness are 510±25MPa and 4.05±0.20MPa·m1/2 at room temperature,respectively.Comparing with the SiC particles-reinforced ZrB2 ceramic,no significant increase in both strength and toughness was observed.The microstructure of the composite showed that the SiC whisker was destroyed because the SiC whisker degraded due to rapid atom diffusivity at high temperature.The results suggested that some related parameters such as the lower hot-pressing temperature,a short sintering time should be controlled in order to obtain SiC whiskerreinforced ZrB2 composite with high properties.
Ultra-high temperature ceramic SiC whisker (SiCw) Mechanical properties
Ping Hu Xing-Hong Zhang Jie-Cai Han Song-He Meng Bao-Lin Wang
Centre for Composite Materials,Harbin Institute of Technology,Harbin,150001,China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
1730-1732
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）