Study on the Properties of β-Sialon Matrix Multiphase Ceramics Material

The main properties of the β-Sialon/corundum,β-Sialon/SiC and β-Sialon/corundum/SiC as well as the effect of Sialon content on properties were studied.The results showed that the resistances to thermal shock and to slag corrosion of the β-Sialon/SiC are better than β-Sialon/corundum,the fracture times of the resistance to thermal shock are up to 40.The oxidation resistance of the β-Sialon/corundum is superior to β-Sialon/SiC.After being oxidized 10 hours at 1400℃,the increasing weight of the samples is as follows:β-Sialon/corundum 29.5mg/cm2,β-Sialon/SiC 36.0mg/cm2,β-Sialon/corundum/SiC 33.0mg/cm2.With the increase of Sialon content of multiphase refractories,the abilities in resistance to thermal shock and to slag corrosion of the β-Sialon/corundum are increased,but its ability in oxidation resistance is decreased.With the increase of Sialon content of them,the ability in resistance to thermal shock of β-Sialon/SiC is decreased,but its abilities in resistance to slag corrosion and the oxidation resistance are increased.