Abstract
Research on diffuse scattering from twist boundaries in gold is reported. In order to obtain an unambiguous measure of the diffuse scattering from the boundary, we developed a technique in which the total diffuse scattering is measured from the same specimen containing the boundary, and then not containing the boundary, and then determining any difference. This is accomplished by first measuring the diffuse scattering from the bilayer specimen containing the boundary. The specimen is then removed from its polymer film support and annealed gently at 175/degree/C in order to convert the metastable layered bicrystal into a more stable structure consisting of columnar grains separated by short transverse boundaries, as illustrated in Fig. 3(b). In this process, the original flat twist boundary is eliminated. The specimen is then remounted on a polymer film support in as reproducible a manner as possible, and the diffuse scattering is again measured. 13 refs., 6 figs.
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