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

Laura Baqué, D. Torrado, G. Aurelio, D. G. Lamas, S. F. Arico, A. F. Craievich, S. Sommadossi

Research output: Contribution to journalJournal articleResearchpeer-review


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 A degrees 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 reaction at T = 290 A degrees C and the other to the peritectic reaction at T = 311 A degrees C.
Original languageEnglish
JournalJournal of Phase Equilibria and Diffusion
Issue number1
Pages (from-to)2-10
Number of pages9
Publication statusPublished - 2014


  • CU11IN9
  • CU10IN7
  • Cu-In alloys
  • differential scanning calorimetry (DSC)
  • intermetallic compounds
  • phase transitions
  • Alloys
  • Copper compounds
  • Differential scanning calorimetry
  • Intermetallics
  • Phase transitions
  • Scanning electron microscopy
  • X ray powder diffraction
  • Cu-in alloys
  • In compositions
  • In-situ synchrotrons
  • Nominal composition
  • Peritectic
  • Phase identification
  • Temperature range
  • Type structures
  • Copper alloys
  • THERMAL stability
  • Research
  • HASH(0x3b4edc8)


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