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Oxidation of high-temperature Cu–Al–Fe shape memory alloy

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Abstract

Isothermal oxidation behavior of the high-temperature Cu–13Al–5Fe (in mass, %) SMA on temperature range of 500–900 °C was studied using thermo-gravimetric method. TG curve showed that the alloy has linear oxidation characteristics. From thermo-gravimetric measurements, it was determined that the alloy shows abnormal oxidation characteristics at 600 °C. As K P values of the alloy at oxidation temperatures of 700 and 800 °C were calculated as 0.00166 mg cm−2 s−1 and 0.0022 mg cm−2 s−1, respectively, K P value at 600 °C was found as 0.0029 mg cm−2 s−1. DTA curve exhibited that reason of the abnormal oxidation behavior at 600 °C is the endothermic reaction which causes dissolution of Fe(Al,Cu) precipitates within matrix at 568.13 °C. XRD patterns of the oxidized samples were found to be compatible with the results obtained from thermo-gravimetric measurements.

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Acknowledgements

The thermo-gravimetric analysis of samples was done by E. Ercan (Bitlis Eren University).

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  1. Department of Physics, Firat University, 23119, Elazig, Turkey

    Koksal Yildiz

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  1. Koksal Yildiz
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Yildiz, K. Oxidation of high-temperature Cu–Al–Fe shape memory alloy. J Therm Anal Calorim 123, 409–412 (2016). https://doi.org/10.1007/s10973-015-4912-6

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  • DOI: https://doi.org/10.1007/s10973-015-4912-6

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