Peculiarities of the interaction of the components in the Gd–Cu–Sn ternary system at 670 K and 770 K

Chem. Met. Alloys 2 (2009) 68-74

https://doi.org/10.30970/cma2.0095

L. ROMAKA, V.V. ROMAKA, E.K. HLIL, D. FRUCHART

Isothermal sections of the phase diagram of the Gd–Cu–Sn ternary system were constructed at 770 K and 670 K in the whole concentration range using X-ray, metallographic, and differential thermal analyses. The interaction of the components in the Gd–Cu–Sn system at 670 K results in the existence of five ternary compounds, while at 770 K only four intermediate phases were observed. Detailed crystal structure investigations were performed for the GdCu₅Sn (CeCu₆-type) and Gd₂Cu₃Sn₆ (Sm₂Cu₄Sn₅-type) compounds. The existence of a substitutional solid solution GdCu_5-xSn_x (up to 5 at.% Sn) was observed at both temperatures.

Observed, calculated and difference X-ray patterns for the Gd₁₅Cu₇₀Sn₁₅ sample.

Keywords

Intermetallics / Phase diagrams / Crystal structure / X-ray diffraction / Rare earth system