Fabrication, Microstructure and Properties of Nitrides Bonded Alumina Castables by In Situ Nitridation Reaction
Nitrides(Si3N4/Sialon) bonded alumina castables were fabricated by in situ nitridation reaction. Effects of the formation of nitrides on the physical properties, hot strength and thermal shock resistance were investigated. The results show that the phase composition of castables is alumina, a-Si3N4, b-Si3N4 and Si2N2O after fired at 1400ºC and 1450ºC, and is alumina, b-Sialon and O’-Sialon after fired at 1500ºC. Hot modulus of rupture and thermal shock resistance of specimens are noticeably improved due to the formation of nitrides.
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
Q. L. Jia et al., "Fabrication, Microstructure and Properties of Nitrides Bonded Alumina Castables by In Situ Nitridation Reaction", Advanced Materials Research, Vols. 284-286, pp. 69-72, 2011