THE ELASTIC MODULI AND DIAMETRICAL COMPRESSIVE FRACTURE STRESS OF AL2O3-ZRO2 CERAMICS

摘要

Young's moduli of green and sintered unstabilized Al2O3-ZrO2 ceramics have been determined by measuring compression and shear velocities through the material and, from separate measurements, the associated bulk density. Young's modulus and sintered density of Al2O3-ZrO2 ceramics can be enhanced by increasing the compacting pressure when forming the green ceramics and with the addition of <5 wt% of unstabilized ZrO2. For a particular green compacting pressure, the trend in the diametrical compressive fracture stress is similar to that of Young's modulus. The fracture stress also increases with a higher green compacting pressure at a constant wt% ZrO2. [References: 63]