Some observations on boundary segregation during grain growth annealing of ultrapurity aluminum

摘要: Abstract Previous studies have indicated the development of much larger solute concentrations at grain boundaries in dilute aluminum alloys subjected to growth annealing than would be predicted on basis existing theory. Data from additional are presented along with an analysis suggesting that segregation moving differs appreciably stationary interfaces. In particular, these data suggest 1. (a) density adsorbed is a function distance through which boundary has migrated, 2. (b) given sufficient motion, concentration approximating monolayer will developed regardless specimen purity and 3. (c) both equilibrium non-equilibrium processes operative.