Isothermal section of the Pd–Cu–In system at 500°С

Abstract The partial isothermal section of the Pd–Cu–In system at 500 °C with 0–50 at. % In was plotted experimentally using scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD). The addition of the third components significantly stabilizes binary compounds β PdCu and η′ Cu2In. The solubility of copper in the InPd phase is close to 10 at.%. The phases InPd2, In3Pd5, and In3Pd2 do not dissolve any significant amount of copper. The new ternary compound InPd2Cu is found at about 25 at. % In from 3 to approx. 29 at. % Cu. This compound crystallizes in tetragonal structure of the VRh2Sn type. Its crystal structure, parameters of unit cell, as well as the distribution of atoms over crystallographic positions have been established by Rietveld method.