Phase equilibria in the Sm–Co–Sn ternary system at 870 K and 770 K

Chem. Met. Alloys 1 (2008) 198-203

https://doi.org/10.30970/cma1.0061

L. ROMAKA, V.V. ROMAKA, M. KONYK, N. MELNYCHENKO-KOBLYUK

The phase diagram of the Sm–Co–Sn ternary system was constructed at 770 K (more than 55 at.% Sn) and 870 K (0–55 at.% Sn) using X-ray and metallographic analyses. Seven ternary intermetallic compounds, Sm₃Co₈Sn₄ (Lu₃Co_7.77Sn₄-type), Sm₆Co₂Sn (Ho₆Co₂Ga-type), Sm₁₂Co₆Sn (Sm₁₂Ni₆In-type), Sm₃Co₆Sn₅ (Dy₃Co₆Sn₅-type), Sm₂CoSn₂ (related to the Tb₁₁₇Fe₅₂Ge₁₁₂-type), SmCo_1-xSn_2-y (CeNiSi₂-type), and Sm₆Co₈Sn₂₆ (Yb₆Rh₈Sn₂₆-type), are formed in this system at the investigated temperatures.

Electron micrograph of the Sm₃₅Co₃₀Sn₃₅ alloy.

Keywords

Intermetallics / X-ray diffraction / Phase diagrams / Crystal structure