The microstructure of the AuCu-6at.%Ag alloy has been studied by conventional electron microscopy as well as by high resolution electron microscopy. The combination of these techniques with optical diffraction allowed the identification of a face-centred cubic disordered α phase which, depending on the aging temperature, coexists with AuCu I or AuCu II. Precipitates of this α phase are finely dispersed and are sometimes as small as 10 nm × 2 nm. The atomic disorder along the periodic antiphase boundaries in AuCu II and their wavy character can be visualized and semiquantified by comparing high resolution observations with calculated images.
All Science Journal Classification (ASJC) codes
- General Engineering