Abstract
Phase relationships in the Yb-Fe-Sb ternary system at 530 °C were investigated mainly by powder metallurgy and X-ray powder diffraction. Nine binary compounds (Yb 6Fe 23, Yb 2Fe 17, FeSb, FeSb 2, YbSb 2, YbSb, Yb 11Sb 10, Yb 4Sb 3, and αYb 5Sb 3) and one ternary compound (Fe 4YbSb 12) were confirmed in this system at 530 °C. The homogeneity range of FeSb phase extended from approximately 43at.%Sb to 45at.%Sb, the maximum solid solubility of Sb in Fe phase and Yb in FeSb phase was approximately 3at.%Sb and 1at.%Yb at 530 °C, respectively. Isothermal section of the phase diagram of the Yb-Fe-Sb ternary system at 530 °C consisted of thirteen single-phase regions, twenty-four two-phase regions, and twelve three-phase regions.
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