STRESS INDUCED BINARY DIFFUSION IN A SOLID

Preparation of a model which examines the transient conditions by which a steady state is achieved when a stress gradient is applied to a solid containing two diffusible ions. The problem has particular application to delayed elastic effects and internal friction in glasses containing mixed alkali ions, but is relevant to ion-substituted crystals. It is concluded that the preliminary migration of the fast moving species develops the major portion of the space charge distribution in the sample and that the subsequent long term ion interchange proceeds under virtually constant electric field conditions.