Co-Zn (Cobalt-Zinc)

The Co-Zn phase diagram in [Massalski2] was drawn based on several old data published before 1976.

Figure 1 shows the Co-Zn phase diagram calculated by [2004Vas]. The ${\upgamma_{1}, \upgamma_{2}}$, and ${\updelta}$ phases were assumed to be line compounds. ([Massalski2] showed ∼1 at.% solubility ranges for these phases.) New features in this phase diagram unknown in [Massalski2] are the formation of ferromagnetic + paramagnetic (${\upalpha \hbox{Co}}$) two-phase field and the (${\upalpha \hbox{Co}) = (\upvarepsilon \hbox{Co}) + \upbeta_{1}}$ eutectoidal reaction. The locations of these reactions in the phase diagram must be confirmed experimentally.

Fig. 1

Co-Zn phase diagram