高強度Si₃N₄セラミックス

抄録

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·m^1/2).