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

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 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 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) + (αCeC2), (γFe) + 1 + (αCeC2), (γFe) + 1 + (Ce2C3), (αCeC2) + 1 + (Ce2C3) and L + (γFe) + (Ce2C3) plus the corresponding two-phase regions

Phase equilibria in the Cr-Si-Ti system below 40 at.% Si

Highlights• Phase relations in Cr-Si-Ti system have been studied experimentally.• Partial liquidus and solidus projections have been constructed.• Partial isothermal sections at 1450, 1150 °C, isopleths at 10 at.% Si, 50 at.% Ti were constructed.• γTiCr2 is stabilized by additions of Si, and in the ternary system melts congruently at >1600 °C.International audiencePhase transformations in the Cr-Si-Ti ternary system have been studied using differential thermal analysis (DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA) at silicon content <40 at.%. Partial liquidus and solidus projections and the melting diagram (solidus + liquidus) have been constructed. Some sections as partial isothermal at 1450 and 1150 °C, isopleths at 10 at.% Si and 50 at.% Ti are described. The liquidus surface is characterized by the presence of primary crystallization regions of a solid solution (Cr,βTi) and binary based phases (Cr3Si), (Ti5Si5) and the Laves-phase C14, which is stabilized by additions of silicon, and in the ternary system melts congruently above 1600 °C. The solidus surface is characterized by the presence of three-phase fields: (γTiCr2) + (Cr3Si) + (Cr,βTi), (Ti5Si3) + (γTiCr2) + (βTi,Cr) and (Ti5Si3) + (γTiCr2) + (Cr3Si). The former two regions form invariant four-phase eutectic equilibria L ↔ (βTiCr2) + (Cr3Si) + (Cr,βTi) and L ↔ (Ti5Si3) + (γTiCr2) + (βTi,Cr) at 1534 and 1243 °C, respectively. The maximum of the solidus temperature of about 1580 °C is observed in the field (γTiCr2) + (Cr,βTi). At 1495 °C the solid-state transformation (γTiCr2) + (Cr3Si) ↔ (Ti5Si3) + (Cr,βTi) takes place

Phase Equilibria in the Ti-Zr-Sn System

International audienc

Isothermal section of the Ti-Ga-Sn system at 1300C

International audienc