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

• Published in: Journal of alloys and compounds Vol. 845; p. 156166
• Main Authors: Ptashkina, E.A., Kabanova, E.G., Kalmykov, K.B., Kuznetsov, V.N., Zhmurko, G.P.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 10.12.2020; Elsevier BV
• Subjects: Copper; Copper compounds; Crystal structure; Crystallography; Cu-In-Pd phase diagram; Energy dispersive X ray analysis; Phase equilibria; Rietveld method; Ternary compound; Unit cell; X ray analysis; Ternary compound; Phase equilibria; Rietveld method; Cu-In-Pd phase diagram
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2020.156166

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. •Phase equilibria in the Pd–Cu–In ternary are studied at 500 °C.•New ternary compound CuPd2In (VRh2Sn type) is found at 500 °C.•Its structure is ordered derivative of high-temperature modification of InPd3.•Dissolving of In β PdCu causes large increase of Pd content in that phase.•The solubility of palladium in ηˈ phase of the Cu–In system is 17 at. %.