The order–dsorder transition at twin boundaries in Cu3Au as studied by TEM

Publisher Website
Google Scholar
Abstract
The order-disorder phase transition at ∑ = 3{111}- and {211}-type twin boundaries has been studied in the L12-ordered alloy Cu3Au employing in situ heating in a transmission electron microscope. Evidence is presented for an order-disorder phase transition occurring in these boundaries prior to the bulk transition. The temperature difference ΔT between the transition temperature of both boundary types and the bulk is estimated as 0.5K <ΔTT c for the twin boundaries can be established as yet. The nature of the order-disorder transition in both twin boundaries is presumably a second-order phase transition.