Abstract
Abstract It is shown that the penetration plots of the grain-boundary diffusion of 65Zn in polycrystalline Al samples are curved at fixed temperatures and that this upward curvature changes with the annealing time. The penetration profiles can be interpreted in terms of sub-boundary diffusion characterized by the parameter P 1 (= D 1 K 1δ, where D 1 is the boundary diffusion coefficient, K is the segregation factor and δ is the grain-boundary width) as well as by a distribution of diffusion parameters for high-angle boundaries. The range of variation of the diffusion parameters for general large-angle grain boundaries can be characterized by the parameters P 1, P 3 and P 4. The temperature dependence of P 1, P 2 and P 3 has also been determined. It is concluded that if we approximate the penetration function by one effective slope in the B-kinetic regime of grain-boundary diffusion then the weight of different grain boundaries (with different grain-boundary diffusion coefficients) can vary greatly in the ...
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.
