Isothermal sections of the
Sm–Co–Zn and Gd–Co–Zn phase
diagrams at 470 K
Chem.
Met. Alloys 1
(2008) 168-173
https://doi.org/10.30970/cma1.0053
Oksana Ya. ZELINSKA, Anatoliy
V. ZELINSKIY, Volodymyr V. PAVLYUK
Phase equilibria in the Sm–Co–Zn and Gd–Co–Zn ternary systems have been
investigated by X-ray powder diffraction. The isothermal sections of their phase
diagrams have been constructed over the whole
concentration range at 470 K. The Sm–Co–Zn system is characterized by the formation
of six ternary
compounds: Sm2Co2Zn15,
SmCo3.2-3.5Zn1.8-1.5, SmCo4.4Zn0.6,
Sm2Co5Zn2, SmCo2Zn, and SmCo2Zn20. The Gd–Co–Zn system is described
by the formation
of four ternary
compounds: Gd2Co2Zn15,
GdCo3.5-3.8Zn1.5-1.2, Gd2Co5Zn2, and GdCo2Zn20. The maximum solid solubility
of Zn at
470 K is observed in the binary
SmCo2 compound (15 at.%),
and the maximum
solid solubility of Co is
observed in the GdZn compound
(10 at.%). The homogeneity ranges of the solid solutions on the basis
of the other binary
phases do not exceed 5 at.%.
Isothermal section of
the Sm–Co–Zn phase diagram at 470 K.
Keywords
Ternary alloy system / Phase diagram / Intermetallic
compound / Solid solution