Abstract
The constitution of binary alloys of Mn and Zn has been investigated mainly by X-ray and magnetic examinations. A revised phase diagram is presented, which differs from the so-called Hansen’s phase diagram in the following points. (1) There is a new ferromagnetic phase, named the β1 phase, extending from 50 to 56 at% Mn at temperatures below 180°C, and (2) the βMn-phase field is much wider, the Mn-poor boundaries being located at 53, 56 and 69 at% Mn at temperatures 250°, 300° and 400°C, respectively. The cubic-tetragonal transformation of the α′ phase and the existence of the metastable ε′ phase are also mentioned briefly.
