ABSTRACT
Systems with Rare Earth Metals of the Yttrium Subgroup, except Ytterbium
The phase transformations during the solid solution decomposition were studied using light
and transmission electron microscopy for most of these systems, M g - Y [254, 255, 267],
M g - G d [269, 271, 280], M g - T b [268], M g - D y [266] and M g - E r [273]. The studies
revealed that there were the same transformations in all the systems at all stages of decom-
position. For the rest of the systems, M g - H o , M g - T m and M g - L u , the structure of the
alloys after the solid solution decomposition was not studied by transmission electron
microscopy, and only the light microscopy method was applied. This method could reveal
only the latest stages of solid solution decomposition. Meanwhile, the l imited data obtained
in the M g - H o , M g - T m and M g - L u by light microscopy confirmed the similarity of phase
transformations in all systems.
