Analysis of Deformation Mechanisms in the High Temperature Creep of an AluminaMatrix Composite Reinforced with SiC Whiskers

摘要

The creep behavior of unreinforced polycrystailine alumina is now welldocumented: diffusion creep occurs at small grain sizes with a stress exponent, n, of I but at large grain sizes there is a transition to a dislocation mechanism with n close to 3. Experiments on an alumina composite, reinforced with 9.3