ANOMALOUS EXPONENT IN THE KINETICS OF GRAIN-GROWTH WITH ANISOTROPIC INTERFACIAL ENERGY

The effect of grain-boundary orientational anisotropy on growth kineti cs is examined within the context of stochastic theories of grain grow th. Grain growth is characterized by power laws of the type, l proport ional to t(alpha), where l is some linear dimension measuring grain si ze and t is the time. In the case of normal grain growth the growth ex ponent is 0.5. It is shown that grain-boundary anisotropy leads to a s lower growth kinetics with an anomalous exponent of 0.25 in agreement with Q-state Potts models of grain growth.