Abstract
Abstract Based on phenomenological equations and atomistic diffusion theory, general equations have been derived for vacancy diffusion in solids. The normally used diffusion equations are found to be special forms of the general equations under the assumption of low vacancy concentration or homogenous vacancy distribution. The general equations should be used to describe diffusion in solids that have high vacancy gradients, such as in barrier passive films. However, in the presence of a high electric field, vacancy gradient effects are considerably muted and the classical Nernst–Planck equations appear to be adequate for describing the transport of vacancies through the barrier layer.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
