Journal of the Ceramic Society of Japan · 1989 · 30 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsMechanical Behavior Of MaterialsCeramic TechnologyCeramic Toughening MechanismsSilicon MaterialsStructural CeramicsCeramic Fracture BehaviorCeramic Fracture ToughnessCeramic PowdersFracture Of CeramicsHigh-temperature Fracture ToughnessHigh-temperature StrengthHot PressingSilicon Nitride Ceramics
Si3N4 ceramics composed of fine-grained α′-Si3N4 and β′-Si3N4 were fabricated by hot-pressing mixtures of Si3N4, Y2O3 and AlN powders. The Si3N4 ceramics showed a very high strength (about 1.3GPa at room temperature and 1.0GPa at 1400°C) and a high fracture toughness (about 7.0MPa·m1/2).