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 τ 1 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 τ 1 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) + (αCeC 2 ), (γFe) + τ 1 + (αCeC 2 ), (γFe) + τ 1 + (Ce 2 C 3 ), (αCeC 2 ) + τ 1 + (Ce 2 C 3 ) and L + (γFe) + (Ce 2 C 3 ) plus the corresponding two-phase regions. [ABSTRACT FROM AUTHOR]