The nature of domain walls (also called antiphase boundaries) in a Cu-Pd alloy ordered on the FCC lattice has been studied as a function of temperature, using conventional and high-resolution microscopy. At low temperature, the domain walls are perfectly thin and faceted. Complete interfacial wetting by the disordered phase, characterized by a divergence of the width of the walls, is shown to occur when approaching the order-disorder transition.
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Ricolleau et al. (1991) studied this question.
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