Dense, pure SiC monoliths with excellent oxidation resistance sintered at low temperatures and high pressures

作者：Liang, Bn; Yang, Zhihua^*; Zhu, Qishuai; Miao, Yang; Jia, Dechang; Wang, Shengjin; He, Peigang; Duan, Xiaoming; Zhou, Yu

来源：Ceramics International, 2015, 41(10): 15227-15230.

DOI：10.1016/j.ceramint.2015.07.009

• Sintering
• Mechanical properties
• Thermal properties
• SiC

Pure SiC ceramic monoliths were sintered at 1100-1200 degrees C and 5 GPa coupled with mechanically alloying. The mechanically alloyed SiC powders are nearly completely amorphous containing a small quantity of 2 nm-sized crystallites. The resulting monoliths consist of amorphous and 3C-SiC nanocrystallites (< 5 nm), and offer relative densities >= 93.0%, nanohardnesses >= 34.0 GPa and elastic moduli >= 378 GPa. In the flowing air at 1500 degrees C, they undergo minimal mass change indicative of excellent oxidation resistance.

• 出版日期2015-12
• 单位哈尔滨工业大学