Abstract
In this article, a novel method has been used to prepare a copper matrix nanocomposite containing Cu-10 wt pct Cr-10 wt pct Al2O3 by heat treatment of the mechanically activated Cu, Al, and Cr2O3 powder mixture. Structural evolutions were investigated using the X-ray diffraction (XRD) technique. The microstructure of samples was examined using scanning electron microscopy (SEM). It was found that during the milling process, Cu(Al) solid solution and Cu9Al4 phase were formed as the intermediate products, and therefore, Al activity was decreased. Hence, the reduction of Cr2O3 with Al was prevented during the ball milling stage. Further heat treatment carried out under argon atmosphere at 900 °C for 8 hours resulted in completion of Cr2O3 reduction by Al.
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FRITSCH P6 is a trademark of Fritsch GmbH Company, Idar-Oberstein, Germany.
OXFORD INSTRUMENTS is a trademark of the Oxford Instruments plc Company, Abingdon, Oxfordshire, United Kingdom.
PHILIPS is a trademark of FEI Company, Hillsboro, OR.
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The financial support of this work by the Iranian Nanotechnology Initiative Council is gratefully acknowledged.
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Manuscript submitted July 23, 2009.
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Sheibani, S., Ataie, A. & Heshmati-Manesh, S. In-Situ Synthesis of Cu/Cr-Al2O3 Nanocomposite by Mechanical Alloying and Heat Treatment. Metall Mater Trans A 41, 2606–2612 (2010). https://doi.org/10.1007/s11661-010-0281-8
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DOI: https://doi.org/10.1007/s11661-010-0281-8