Microstructure and Morphology of Alumina-Iron Nanocomposite Powders Produced by High Energy Mechanical Milling

Abstract:

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Alumina-iron nanocomposite powders containing 5vol.% of iron were fabricated by high-energy ball milling with different ball-to-powder weight ratios (BPRs) as part of the study of ceramic-metal nanocomposite magnetic materials. The microstructure and morphology of the composite powders were characterized using the X-ray diffraction, optical microscopy and scanning electron microscopy. XRD analysis and SEM examination in combination with energy dispersive X-ray spectrometry confirmed that the nanocomposite structure of the powder particles formed only after 8 hours milling for both BPRs used. With a higher BPR of 16:1, Fe-Cr alloy material was broken from the stainless steel balls and incorporated into the nanocomposite powder. However, such a problem did not occur with a lower BPR of 5:1. The mechanism for formation of the alumina matrix nanocomposite powder is found to be dependent on BPR and milling time.

Info:

Periodical:

Advanced Materials Research (Volumes 29-30)

Edited by:

Deliang Zhang, Kim Pickering, Brian Gabbitas, Peng Cao, Alan Langdon, Rob Torrens and Johan Verbeek

Pages:

131-134

DOI:

10.4028/www.scientific.net/AMR.29-30.131

Citation:

M. Yusop et al., "Microstructure and Morphology of Alumina-Iron Nanocomposite Powders Produced by High Energy Mechanical Milling ", Advanced Materials Research, Vols. 29-30, pp. 131-134, 2007

Online since:

November 2007

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$35.00

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