Experimental determination of phase equilibria in the Mn-Zn binary system

Imatomi, Daisuke*; Ishikawa, Ryosuke*; Nakata, Akira*; Ito, Tatsuya; Han, K.*; Nagasako, Makoto*; Xu, X.*; Omori, Toshihiro*; Kainuma, Ryosuke*

Journal of Phase Equilibria and Diffusion, 45(1), p.3 - 17, 2024/02

https://doi.org/10.1007/s11669-023-01068-6

Phase equilibria in the Mn-Zn binary system were experimentally determined by chemical composition examination, crystal structure determination, and thermal analysis. Major changes were detected for the , , and phases. The -B2 single-phase region could not be confirmed in the studied system because a disordered body-centered cubic structure, which is identical to the Mn phase, was confirmed in a quenched sample from the previously proposed region of phase. The phase has been controversial whether the phase is separated into , , and phases or not. By studying a diffusion couple and several alloy compositions, it was established that the , , and phases are not separate and comprise a single phase. Furthermore, the phase is not present in the Zn-rich region of the system because the corresponding invariant reactions were not detected via thermal analysis.