Model for Grain Boundary Diffusion Controlled Growth of Deep Liquid Channels

摘要

The penetration of liquid phase along grain boundaries is a very important process in any case including the contacts between liquid and solid metals. In this paper the model is presented of deep grain boundary channels formation based on grain boundary diffusion mechanism. According to the model the depth of the liquid channel is proportional to the square root of time for "C" regime and to the fourth root of time for "B" regime of grain boundary diffusion. The estimated depths of channels correlate well with the experimental results for Bi-Cu system.