The phase diagram of the Fe–Mn–Ce system were studied using DTA, X-ray, SEM and EPMA.
The stability of the ternary compounds Fe11Mn6Ce2 (τ1) and Fe5Mn7Ce (τ2) at 900 °C was confirmed.
The solubilities of Mn in βFe17Ce2 and Fe2Ce were established to be 18 and ∼28 at.%, respectively.