Particle-Inhibited Grain Growth in Al2O3-SiC: II, Equilibrium and Kinetic Analyses

摘要: The grain-growth data presented in a companion paper for the Al 2 O 3 -SiC system are analyzed. Central to analysis is experimentally observed relationship between fraction of particles on grain boundaries, Φ, and average size, G. This included both equilibrium-grain-size expression originally formulated by Zener classical rate equations. modified equilibrium G L , as function volume pinning particles,f, contains power-law dependence f that has been developed using Φ during microstructure evolution. expressions kinetics similarly developed. kinetic relationships used describe experimental from predict behavior. A new type map constructed time required approach annealing temperature. reveals extreme conditions (very long times high temperatures) necessary reach equilibrium, especially smaller fractions, attainment quite difficult.