Abstract
Grain boundary diffusivities of a 110Ag radioactive tracer have been measured in polycrystalline Pb specimens over a temperature range of 57–118 °C. Diffusivity parameter values are expressed by the Arrhenius relation: P(cm3 s−1)=Dgbδα=1.58×10−4 ×exp(−41120 J mol−1/RT). These values are five orders of magnitude higher than those relative to self-grain boundary (gb) diffusivity of lead. Thus, the difference between silver and lead grain boundary mass transport is almost the same as that measured for bulk diffusion. The possible explanations for such a similarity are discussed in relation with the particular bulk diffusion mechanism of silver and a possible high grain boundary segregation of this solute.
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.
