ABSTRACT
Y in the M g - Y - S c system seems to be one of the examples of such a specific behaviour
of Sc.
Ternary Mg Systems with One Rare Earth Metal as a Component
A s far as there are certain similar features in the constitution of the binary phase diagrams
of different rare earth metals with any other metal, it is reasonable to expect also similar
features in the constitution of M g - R E - X phase diagrams, where R E are different rare earth
metals and X is a metal other than a rare earth one. In general, such a conclusion can indeed
be made comparing the ternary phase diagrams of the M g - R E - X type studied, although
certain differences do exist between the phase diagrams M g - R E - X , where X is the same
metal being other than R E . Therefore, it is reasonable to carry out consideration of the
ternary phase diagrams of M g with one rare earth metal as a component in the order of the
opted third components X . Main ly they are Zr, M n , A l , Z n which are widely used in
commercial magnesium alloys as alloying elements. Three other third components chosen
for studies are N i , C d and S i . They are also used for alloying of M g alloys, but much more
seldom.
