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


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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.



Advanced Materials Research (Volumes 29-30)

Edited by:

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




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




[1] R.W. Rice: Mechanical Properties of Ceramics and Composites (Marcel Dekker Inc., New York 2000).

[2] C. Suryanarayana: Mechanical Alloying and Milling (Marcel Dekker Inc., New York 2004).

[3] K. Niihara and Y. Suzuki: Mater. Sci. Eng. Vol. A261 (1996), p.6.

[4] S.T. Oh, T. Sekino and K. Niihara: Nanostruct. Mater. Vol. 10, No. 2 (1998), p.327.

[5] P.A. Trusty and J.A. Yeomans, J. European Ceram. Soc. Vol. 17 (1997), p.495.

[6] S.T. Oh, M. Sando and K. Niihara: J. Mater. Sci. Vol. 36 (2001), p.1817.

[7] T. Ambrose, A. Gravin and C.L. Chien: J. Magn. Magn. Mater. Vol. 116 (1192), p. L311 Al Fe Fe Fe O Al Fe Cr O Fe Fe Cr.

DOI: https://doi.org/10.2355/tetsutohagane1955.83.1_1