High Hardness and Ductile Mosaic SiC/SiO2 Composite by Spark Plasma Sintering

作者：He, Zhenhua; Katsui, Hirokazu^*; Tu, Rong; Zhang, Jianfeng; Goto, Takashi

来源：Journal of the American Ceramic Society, 2014, 97(3): 681-683.

DOI：10.1111/jace.12813

• MECHANICAL-PROPERTIES
• SILICON-CARBIDE
• MICROSTRUCTURE
• TEMPERATURE
• TOUGHNESS

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 1923K for 1.8ks. The SiC(core)/SiO2(shell) powder with a 80-100nm thick SiO2 layer resulted in a SiC/SiO2 composite with a relative density of 97% and hardness and fracture toughness of 17.1GPa and 8.4MPam(1/2), respectively.

• 出版日期2014-3
• 单位武汉理工大学