ReactionBondedSiliconCarbide(SiSiC)andPressureSinteredSiliconCarbide(SSiC)mechanicalsealingrings,andnozzle.PropertiesPurity(％)Hardness(HRA)Grainsize(um)Density(g/cm3)Staticbendingstrength(MPa)CompressiveStrength(MPa)FractureToughness(MPa)ThermalConductivity（Wm/k）SELF-SINTEREDSILICONCARBIDE＞97≥900.5-0.73.06-3.15400-58039003.05-4.6102.6REACTIONBONDEDSILICONCARBIDE＞90≥908-20＞3.05350-450＞25004.335-110SILICONCARBIDE+CARBONCarboncontent30%≥8520-40＞2.652001800125SiCmechanicalseals,sealingmaterialsandshaftsealswithhighhardness,excellentthernmalandelectricconductivity1.wear-resistance2.erosion-resistance3.goodthermalconductivity4.goodelectricconductivity5.hightemperatureresistance)