首页|Influence of Hot Pressing Temperature and SiC Content on the Microstructure and Mechanical Properties of ZrB_2-SiC
Influence of Hot Pressing Temperature and SiC Content on the Microstructure and Mechanical Properties of ZrB_2-SiC
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NETL
NSTL
Trans Tech Publications Ltd
The influence of hot pressing temperature and SiC content on the microstructure and mechanical properties of ZrB_2-SiC ceramics was investigated. ZrB_2 containing 20 volume percent SiC were prepared by hot pressing at 1850, 1900 and 1950℃ for 60 min. Fully dense ceramic was obtained after hot pressing at temperature of 1950℃. In addition, the materials with SiC content of 0, 10vol.%, 15 vol.%, 20 vol.% and 30 vol.% hot pressed at 1950℃ were also investigated. Results showed that the grain size of the ZrB_2 significantly reduced on adding 10vol.% SiC and then decreased slightly with further increasing SiC content, whereas the grain size of SiC exhibited a opposite trend. The flexural strength of ZrB_2-SiC ceramics remarkedly increased on adding 10vol.% SiC due to the significant decrease of ZrB_2 particle size and then slightly increased with increasing SiC content up to 20vol.%. However, further increasing SiC content led to a reduction of the flexural strength.
ZrB_2SiCmicrostructuremechanical properties
Yong Zhang、Ping Hu、Xing-Hong Zhang
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Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, PR China
NETL
NSTL
Trans Tech Publications Ltd
