The ternary system Ce–Si–Y

Thermodynamic assessment of the Mn–Y–O system

“…This system is dominated by the strong Mn-Y 2 O 3 diagonal, which actually divides the Mn-Y-O system into two ternary sub-systems: Mn-Y 2 O 3 -O and Mn-Y 2 O 3 -Y. There is already a liquid phase at 1273 K, due to the eutectic reaction of Mn 2 Y and hcp-Y at 1152 K in the Mn-Y binary sub-system [14]. A ternary miscibility gap, extending from the binary Mn-O system, exists in the liquid phase at 2273 K.…”

“…A minor difference can be found in the Mn 2 O 3 liquidus, which corresponds to high oxygen partial pressure (>1 MPa) and where no experimental information exists. Flandorfer et al [14] published an optimized set of Gibbs energy functions for the Mn-Y-Zr system. We simply accepted their description of the Mn-Y system, except for the Gibbs energy function of hcp-Mn (metastable).…”

“…5. GMN12Y, GMN23Y6, and GMN2Y are the molar Gibbs energies of manganese yttrium intermetallics from Flandorfer et al [14]. 6.…”

“…The thermodynamic properties of h-YMnO 3 and YMn 2 O 5 were assessed. Based on the assessments of the Y-O system by Chen et al [12], the Mn-O system by Grundy et al [13], and the Mn-Y system by Flandorfer et al [14], a thermodynamic description of the complete Mn-Y-O system is presented. A tentative MnO x -YO 1.5 phase diagram in air and the isothermal sections of the Mn-Y-O system at different temperatures were calculated.…”