An Updated Evaluation of the Fe-Gd (Iron-Gadolinium) System

Fe-Ga-Gd (Iron-Gallium-Gadolinium)

“…Both these compounds are present at a constant Gd content of 7.7 at.%. GdFe 5 Ga 7 shows a homogeneity range of 53.8-59.2 at.% [2009Liu], which corresponds to a range of GdFe 5 Ga 7 -GdFe 4.3 Ga 7.7 . …”

“…Two ternary compounds are stable in this system at 500°C [2009Liu]: GdFe 5.3 Ga 6.7 (ScFe 6 Ga 6 -type orthorhombic, space group Immm, lattice parameters: a = 0.85676 nm, b = 0.86960 nm and c = 0.50782 nm, denoted as s 1 here and as d by [2009Liu]) and GdFe 5 Ga 7 (ThMn 12 -type tetragonal, a = 0.8651 nm and c = 0.50934 nm, denoted s 2 here and e by [2009Liu]). Both these compounds are present at a constant Gd content of 7.7 at.%.…”

“…With starting metals of 99.99+% purity, [2009Liu] arcmelted about 130 alloys under Ar atm. The samples were given a final anneal at 500°C for 3 days and quenched in liquid nitrogen.…”

“…The phase equilibria were studied with x-ray powder diffraction. The isothermal section constructed by [2009Liu] at 500°C is shown in Fig. 1.…”

“…Fe 23 Gd 6 was not detected at 500°C [2009Liu]. No homogeneity ranges were reported by [2009Liu] for aFe 3 Ga; aFe 6 Ga 5 and Fe 3 Ga 4 binary compounds.…”