STEPPED INTERFACE AND CRYSTAL ORIENTATION IN THE EUTECTIC STRUCTURE OF Cu-71.8 wt.% Ag ALLOY
Cu-71.8%Ag共晶体中两相的台阶界面及晶体取向

A eutectic Cu-71.8 wt.% Ag alloy was prepared by conventional process of fusion casting. There are approximate fifty percent of stepped phase interfaces with the step plane surface parallel to (111) and an orientation relationship between phases Cu and Ag symmetrized to the stepped interface in the eutectic structure. The stepped interfaces have a height equal to the average interplanar distance of Cu(111) and Ag(111) and the widths equal to the interplanar distances of 3-4 Cu(11-1). A coincident lattice site of Cu and Ag atoms can exist at the stepped interfaces at regular intervals of 3-4 Cu(11-1).