![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
The temperature dependence of the electrical resistivity of Cu3Au is not well described by a Debye model and any characteristic temperature so chosen is often found to be temperature and order dependent. This is at variance with other studies of elastic modulus or specific heat. However, there are at least three parameters needed to specify the state of order of Cu3Au : the degree of long-range order within antiphase domains, the antiphase domain size and the volume fraction, of domains.
The electrical resistivity and its temperature dependence have been determined for a Cu3Au alloy subjected to a wide range of heat treatments. It is found that the temperature coefficient determined at 100 K is dependent upon the deviation in residual resistivity from that expected for homogeneous long-range order rather than just the degree of long-range order. This is attributed to an enhanced phonon scattering at the antiphase domain boundaries.