1990 年 32 巻 3 号 p. 152-161
A coincidence site lattice (CSL) model is applied t o analyse the boundary structures of Laves phase alloys, Mg (Al0.5 Cu0.5) 2 and Mg (Cu1-x Znx) 2.All the origins in every layer are adopted as lattice points to draw interpenetrating lattices. Due to this extention, the interpenetrating lattices give characteristic CSL-patterns which predict not only detailed ordered structures inside a period appearing at the boundary but also predict smaller DSC-vectors which are Burgers vectors of boundary dislocations. The CSL-patterns as well as the DSC (displacement - shift - complete) - lattices are demonstrated for various layer structures, in order to interpret high resolution electron micrographs of the boundaries of the Laves phase alloys.