Si₃N₄の強度と破壊靱性への酸化処理の効果

抄録

The effects of heat treatment in air on the bending strength and fracture toughness of sintered silicon nitride containing CeO₂, MgO and SrO additives were studied. The bending strength at elevated temperatures was improved 15 to 20% by the heat treatment (1000°C/2h), but the bending strength at room temperature was not affected. The apparent values of fracture toughness for notched specimens increased by the oxidation at the notch root.