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Thermal behavior of the Cu–22.55 at.%Al alloy with small Ag additions

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Abstract

In this study the effect of Ag additions on the thermal behavior of the Cu–22.55 at.%Al alloy was studied using electrical resistivity measurements, in situ X-ray diffractometry, differential scanning calorimetry, and optical microscopy. The results indicated that Ag additions do not change the phase transformations sequence in the studied alloys, but modify its critical temperatures due to a change on entropy of system. It was verified that at the cooling rate of 10 K/min the decomposition of β phase into (α + γ1) is incomplete, but for lower cooling rates than 1.0 K/min this reaction is completed.

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Acknowledgements

The authors thank to the FAPESP (Project no. 2006/04718-0), LNLS-Brazilian Synchrotron Light Laboratory/MCT, CNPq—Brazil, CONICET, ANPCYT, Secretaría de Ciencia y Técnica of the Universidad Nacional del Centro, CICPBA—Argentina and FAPITEC/SE/FUNTEC proc. 019.203.00964/2009-7—Brazil.

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Authors and Affiliations

  1. Campus Prof. Alberto Carvalho-UFS, Itabaiana, SE, Brazil

    R. A. G. Silva

  2. Instituto de Química—Unesp, C. Postal 355, 14801-970, Araraquara, SP, Brazil

    A. T. Adorno, A. G. Magdalena & T. M. Carvalho

  3. Instituto de Física de Materiales Tandil, Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, 7000, Tandil, Argentina

    M. Stipcich, A. Cuniberti & M. L. Castro

  4. CONICET, Buenos Aires, Argentina

    M. Stipcich, A. Cuniberti & M. L. Castro

Authors
  1. R. A. G. Silva
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  2. A. T. Adorno
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  3. A. G. Magdalena
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  4. T. M. Carvalho
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  5. M. Stipcich
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  6. A. Cuniberti
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  7. M. L. Castro
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Correspondence to R. A. G. Silva.

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Silva, R.A.G., Adorno, A.T., Magdalena, A.G. et al. Thermal behavior of the Cu–22.55 at.%Al alloy with small Ag additions. J Therm Anal Calorim 103, 459–463 (2011). https://doi.org/10.1007/s10973-010-0908-4

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  • DOI: https://doi.org/10.1007/s10973-010-0908-4

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