High Hardness and Ductile Mosaic SiC/SiO2 Composite by Spark Plasma Sintering |
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| Authors: | Zhenhua He Hirokazu Katsui Rong Tu Jianfeng Zhang Takashi Goto |
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| Affiliation: | 1. Institute for Materials Research, Tohoku University, , Sendai, 980‐8577 Japan;2. Wuhan University of Technology, , Wuhan, 430070 China;3. International Advanced Research and Education Organization, Tohoku University, , Sendai, 980‐8577 Japan |
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| Abstract: | SiC powder was coated with SiO2 layer by chemical vapor deposition, and the SiC(core)/SiO2(shell) composite powder was consolidated to a SiC/SiO2 composite with a mosaic microstructure by spark plasma sintering (SPS) at 1923 K for 1.8 ks. The SiC(core)/SiO2(shell) powder with a 80–100 nm thick SiO2 layer resulted in a SiC/SiO2 composite with a relative density of 97% and hardness and fracture toughness of 17.1 GPa and 8.4 MPa m1/2, respectively. |
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