Journal of Phase Equilibria and Diffusion

, Volume 35, Issue 1, pp 2–10 | Cite as

Phase Identification of Cu-In Alloys with 45 and 41.25 at.% In Compositions

  • L. Baqué
  • D. Torrado
  • G. Aurelio
  • D. G. Lamas
  • S. F. Aricó
  • A. F. Craievich
  • S. SommadossiEmail author


In this work, the thermal stability of Cu-In alloys with 45.0 and 41.2 at.% In nominal compositions was investigated by differential scanning calorimetry (DSC), scanning electron microscopy, wavelength dispersive spectroscopy, and in-situ synchrotron x-ray powder diffraction (S-PXRD) over a temperature range from 25 up to 400 °C. The studied samples are mainly composed of a Cu11In9 phase together with minor amounts of the B phase (based on the NiAs-Ni2In type structure) and, in one of the samples, with a minor amount of pure In. No evidence of the Cu10In7 (41.2 at.% In) phase was detected, not even in the sample with 41.2 at.% In nominal overall composition. The combined use of the S-PXRD and DSC techniques allowed us to identify two phase transitions involving the Cu11In9 phase, one of them corresponding to the \( \upeta^{\prime} \rightleftharpoons {\text{B}} + {\text{Cu}}_{11} {\text{In}}_{9} \) reaction at T = 290 °C and the other to the peritectic \( \upeta^{\prime} + {\text{L}} \rightleftharpoons {\text{Cu}}_{11} {\text{In}}_{9} \) reaction at T = 311 °C.


Cu-In alloys differential scanning calorimetry (DSC) intermetallic compounds phase transitions 



This work was funded by FONCyT Project PICT 2006-1947, Comahue National University, CONICET, and LNLS (Brazil) under Research Proposal D10B-XPD-10810. The authors acknowledge the beamline staff at LNLS for technical assistance.


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Copyright information

© ASM International 2013

Authors and Affiliations

  • L. Baqué
    • 1
    • 6
  • D. Torrado
    • 2
  • G. Aurelio
    • 3
  • D. G. Lamas
    • 2
  • S. F. Aricó
    • 4
  • A. F. Craievich
    • 5
  • S. Sommadossi
    • 1
    • 2
    Email author
  1. 1.CCT-ComahueCONICETNeuquénArgentina
  2. 2.Engineering FacultyComahue National UniversityNeuquénArgentina
  3. 3.CONICET/Centro Atómico BarilocheSan Carlos de BarilocheArgentina
  4. 4.Departamento de MaterialesCAC-CNEASan MartínArgentina
  5. 5.Institute of PhysicsUniversity of São PauloSão PauloBrazil
  6. 6.Department of Energy Conversion and StorageTechnical University of DenmarkRoskildeDenmark

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