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Influence of Ag addition on the thermal behavior of the Cu-11 mass% Al alloy

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Abstract

In this work the influence of Ag additions on the thermal behavior of the Cu-11 mass% Al alloy was studied using differential scanning calorimetry, in situ X-ray diffractometry and scanning electron microscopy. The results indicated that changes in the heating rate shift the peak attributed to α phase formation to higher temperatures, evidencing the diffusive character of this reaction. The activation energy value for the α phase formation reaction, obtained from a non-isotherm kinetic model, is close to that corresponding to Cu atoms self diffusion, thus confirming that this reaction is dominated by Cu atoms diffusion through the martensite matrix.

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Acknowledgements

The authors thank the support of FAPESP (Project no. 2006/04718-0), LNLS-Brazilian Synchrotron Light Laboratory/MCT and CNPq.

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Authors and Affiliations

  1. Campus “Prof. Alberto Carvalho” – UFS, Av. Vereador Olimpio s/n, Itabaiana, SE, 49500-000, Brazil

    R. A. G. Silva

  2. Instituto de Química–Unesp, C. Postal 355, Araraquara, SP, 14801-870, Brazil

    A. T. Adorno & J. O. Roque

Authors
  1. R. A. G. Silva
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  2. A. T. Adorno
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  3. J. O. Roque
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Correspondence to R. A. G. Silva.

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Silva, R.A.G., Adorno, A.T. & Roque, J.O. Influence of Ag addition on the thermal behavior of the Cu-11 mass% Al alloy. J Therm Anal Calorim 97, 117–121 (2009). https://doi.org/10.1007/s10973-009-0253-7

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  • DOI: https://doi.org/10.1007/s10973-009-0253-7

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