PURE AND APPLIED CHEMISTRY, cilt.71, sa.7, ss.1307-1325, 1999 (SCI-Expanded)
This document provides definitions of terms and processes which are used in describing the migration of host and foreign species through solid materials. Both the phenomenological theory of diffusion and the detailed atomistic mechanisms by which atom transport occurs are treated. Also included are the various types of gradients such as electrical, chemical, thermal and mechanical, which provide the driving forces for diffusion.