Experimental Study of Ternary Fe-Gd-Mo Phase Diagram

Crystal Structure and Point Defects of the Ternary Phase Gd1+nFe12?x?yMox?y (? = Vacancy)

“…A series of alloys within the homogeneity range of the ternary phase [8] and also very close to this composition range were synthesized ( Table 1). They were remelted several times and then annealed at 1200 C for 20 h in an argon atmosphere.…”

A thermodynamic assessment of the Fe‐Gd‐Mo system

“…Recently, the system Fe‐Gd‐Mo has been studied experimentally to a certain extent. Besides three isothermal sections [2–4] the solidification paths of alloys were determined [5]. This made it possible to perform a thermodynamic assessment of this system.…”

“… (a) Experimental isothermal section of the Fe‐Gd‐Mo system at 1473 K [ 3 ] (circles: one phase, squares: two phases, triangles: three phases). (b) Calculated isothermal section of Fe‐Gd‐Mo at 1473 K. …”

“…According to [13], the packing of Nd and (Fe, Ti) atoms in the structure prototype Nd 3 (Fe,Ti) 29 is intermediate compared to the arrangement of the corresponding sites of ThMn 12 ‐type and Th 2 Ni 17 ‐type structures. The composition range of Gd 3 (Fe 1‐ x Mo x ) 29 , if any, is not well known, the compounds with x =0.026 at 1453 K [29] and x =0.038 at 1473 K [3] being only reported. The ζ‐phase was pointed out to exist within the relatively narrow temperature range: 1273 … 1473 K [29].…”

“…where G Fe:Va , G Gd:Va , and G Mo:Va are the Gibbs energies of a solution in which all the substitutional sites are filled with Fe, Gd, and Mo, respectively; υ L Fe,Gd:Va , υ L Fe,Mo:Va , and υ L Gd,Mo:Va are the binary interaction parameters of the corresponding elements pair on the substitutional sublattice. The analysis of experimental data [3, 4] showed that a solid solubility in the ternary terminal solution phases did not exceed that in the binary terminal phases. Therefore, ternary interaction parameters were not included in the thermodynamic descriptions of the bcc , fcc , and hcp phases.…”