EFFECT OF B, C AND AL ON SINTERING OF HOT PRESSED SiC
SU Guoyue; XIA Fei; WEN Lishi(Institute of Metal Research; Academia Sinica; Shenyang)(Manuscript received 23 May; 1986)
Cite this article:
SU Guoyue; XIA Fei; WEN Lishi(Institute of Metal Research; Academia Sinica; Shenyang)(Manuscript received 23 May; 1986). EFFECT OF B, C AND AL ON SINTERING OF HOT PRESSED SiC. Acta Metall Sin, 1987, 23(2): 237-254.
Abstract The microstrueture and sintering behaviour of the hot pressed SiC influenced by A1_8B_4C_7 phase have been studied by SEM, X-ray diffraction analysis and optical microscopy. The A1_8B_4C_7, forming as liquid phase in the presence of additives B, C and Al at 1800-2100℃, may be coagulated at the grain boundaries among SiC particles. Because of an inferior wettability of the liquid phase A1_8B_4C_7 to SiC grains, the hot pressing may be significant to enhance its densification.
