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Low temperature oxidation of copper alloys—AEM and AFM characterization

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Abstract

Oxidation kinetics and oxide structures of three polycrystalline copper grades at different temperatures were studied by analytical transmission electron microscopy (AEM) and atomic force microscopy (AFM). The copper samples were oxidized in air at 200 and 350 °C for 1–1,100 min. AEM and AFM studies indicated that alloying and increase of temperature, accelerated oxidation. At 200 °C local oxidation was observed in the unalloyed copper samples while a uniform oxide layer formed on the alloyed coppers. At 350 °C a uniform oxide layer formed on all copper samples. The oxide structure was nanocrystalline cubic Cu2O after all oxidation treatments at 200 °C and after 5 min oxidation at 350 °C. After 25 and 100 min oxidation at 350 °C the crystal size of copper oxide had grown and the oxide structure was monoclinic CuO.

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Acknowledgement

The authors thank The National Technology Agency of Finland (TEKES) for financial support.

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Authors and Affiliations

  1. Institute of Materials Science, Tampere University of Technology, P.O.B. 589, Tampere, 33101, Finland

    Mari Honkanen, Minnamari Vippola & Toivo Lepistö

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  1. Mari Honkanen
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  2. Minnamari Vippola
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  3. Toivo Lepistö
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Correspondence to Mari Honkanen.

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Honkanen, M., Vippola, M. & Lepistö, T. Low temperature oxidation of copper alloys—AEM and AFM characterization. J Mater Sci 42, 4684–4691 (2007). https://doi.org/10.1007/s10853-006-0351-x

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  • DOI: https://doi.org/10.1007/s10853-006-0351-x

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