Phase equilibria in the Fe-Ce-C system at 1100 °C

Phase equilibria in the Fe-Ce-C system at 1100 °C were studied using X-ray diffraction, SEM and electron probe microanalysis. An isothermal section at this temperature was constructed covering the whole concentration range. The stability of the ternary compound τ1 at 1100 °C, identified previously, was confirmed and its composition determined as 23Fe-29Ce-48C according our data. It is also confirmed that the ternary compound τ1 does not have a homogeneity range. The liquid phase is stable at 1100 °C in the Fe-Ce-C system. The isothermal section is characterized by five three-phase regions: (γFe) + (C) + (αCeC2), (γFe) + τ1 + (αCeC2), (γFe) + τ1 + (Ce2C3), (αCeC2) + τ1 + (Ce2C3) and L + (γFe) + (Ce2C3) plus the corresponding two-phase regions.