Abstract
The effect of isotopic mass on the diffusion of Au in Pb-In alloys has been studied over a composition range of 0–2.0 at.% indium. It has been found that the strength of the isotope effect E is 0.18 ± 0.03 for pure lead with negligible temperature dependence. This result is consistent with other isotope effect measurements for “fast diffusers” in polyvalent materials. The isotope effect increases with increasing In concentration, reaching 0.4 ± 0.04 with 2.0 at.% In added, and the variation with temperature is again less than the experimental error. Since the anticipated value of the isotope mass is near unity for a simple interstitial mechanism for pure lead, it is clear that the diffusion mechanism for Au in Pb-In alloys cannot be accounted for by this mechanism.
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 call
