Temperature Dependence of Young's Modulus and Internal Friction in Alumina, Silicon Nitride, and Partially Stabilized Zirconia Ceramics

The temperature dependence of Young's modulus and internal friction (Q −1 )in alumina, silicon nitride, and partially stabilized zirconia (Y‐PSZ) ceramics was studied. Little change in Q −1 was found for alumina, whereas Q −1 for silicon nitride ceramics increased above 700°C. The Q −1 of Y‐PSZ increased markedly with increasing temperature up to a peak at ∼200°C.