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Phase equilibria of the cu-in system I: Experimental investigation

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Journal of Phase Equilibria

Abstract

Portions of the Cu-In phase diagram were redetermined experimentally, specifically in the compositional region from 32.0 to 100 at % In. The experimental techniques used were differential scanning calorimetry (DSC), differential thermal analysis (DTA), powder X-ray diffraction (XRD), and electron probe microanalysis (EPMA).

The results indicate that the phase Cu11ln9 is stable to low temperatures rather than decomposing at 157 °C. The existence of the“phase bundle” at compositions ranging from 32 to 38 at.% In was not supported by our experimental data. Only two phases were found to exist: η at temperatures higher than 305 to 389 °C, and η at lower temperatures. Minor phase boundary adjustments were made in this region. The peritectic temperature for the formation of Cu11ln9 was found to be 307 ± 1 °C, and the L = Cu11ln9 + (In) eutectic temperature was found to be 154 ± 1 °C. In the study to determine the temperature stability of Cu11lns9, it was found that Culm exists at low temperatures, but the stability was not investigated.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Wisconsin, University Avenue Madison, 1509, WI53706, Madison

    S. W. Chen}

  2. Materials and Process Sciences Center, Sandia National Laboratories, 87185, Albuquerque, JVM

    A. D. Romig

Authors
  1. A. Bolcavage
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  2. S. W. Chen}
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  3. C. R. Kao
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  4. Y. A. Chang
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  5. A. D. Romig
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Bolcavage, A., Chen}, S.W., Kao, C.R. et al. Phase equilibria of the cu-in system I: Experimental investigation. JPE 14, 14–21 (1993). https://doi.org/10.1007/BF02652157

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