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Magnetic Properties of Mechanically Alloyed Nano-Crystalline Cu/Fe Composites

  • C. P. Reed (a1), S. C. Axtell (a1), R. J. De Angelis (a1), B. W. Robertson (a1), V. V. Munteanu (a1) and S. H. Liou (a2)...

Abstract

Metal powders of the composition 70 at% Cu and 30 at% Fe were produced by high energy mechanical alloying of the elemental powders. The powders were processed in a Spex 8000 mixer/mill for various times to investigate the potential of the mechanical alloying process for producing nano-composite structures with modified magnetic properties. Optical microscopy revealed a layered structure of alternating copper and iron that developed upon milling. The spacing between the layers decreased with milling time, becoming optically unresolvable (< 1 μm) after four hours of milling. A single profile x-ray diffraction profile shape analysis technique was used to determine the average diffracting particle size of the copper and iron phases. The diffracting particle size decreases with alloying time reaching values of 7.5 nm and 2 nm, for copper and iron respectively, after eight hours of alloying. The magnetic coercivity increased with milling time initially, reaching a maximum value above 300 Oe after six hours of milling. These results are discussed and compared to results obtained in Ag/Fe and Cu/Fe nano-composite films.

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1. Warren, B.E., X-Ray Diffraction, Addison-Wesley, New York, 1969.
2. Kuo, H.K., Ganesan, P. and De Angelis, R.J., A Method to Study Sintering of a Suoported Metal Catalyst, Microstructural Science, vol. 8, Elsevier North Holland, 1980.
3. Benjamin, J.S. and Volin, T.E., The Mechanism of Mechanical Alloying, Metall. Trans., vol.5, 1974, p. 1929.
4. Luborsky, F.E., High Coercive Materials Development of Elongated Particle Magnets, J. Appl. Phys., vol 32, no. 3, 1961, p. 171S.
5. Reed, C.P., De Angelis, R.J., Zhang, Y.X. and Liou, S.H., Substructure-Magnetic Property Correlation in Fe/Ag Composite Thin Films, Advances in X-Ray Analysis, Vol. 34, Plenum Press, 1991, p. 557.
6. Zhang, Y.X., Liou, S.H., Angelis, R.J. De, Lee, K.W., Reed, C.P. and Nazareth, A., The Process Controlled Magnetic Properties in Nanostructured Fe/Aa Composite Films, J. Appl. Phys., vol.69 (8), 1991, p. 5273.
7. Childress, J.R., Chien, C.L. and Nathan, M., Granular Iron in a Metallic Matrix, Appl. Phys. Lett., vol.56 (1), 1990, p. 95.

Magnetic Properties of Mechanically Alloyed Nano-Crystalline Cu/Fe Composites

  • C. P. Reed (a1), S. C. Axtell (a1), R. J. De Angelis (a1), B. W. Robertson (a1), V. V. Munteanu (a1) and S. H. Liou (a2)...

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