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Processing and Magnetic Properties of Ni-Fe Alloy Dispersed Alumina Nanocomposites

Published online by Cambridge University Press:  21 March 2011

Jai-Sung Lee ,
Sung-Tag Oh  and
Seok Namkung
Jai-Sung Lee
Affiliation:
Dept of Metallurgy and Materials Science, Hanyang University, Ansan 425-791, KOREA
Sung-Tag Oh
Affiliation:
Dept of Metallurgy and Materials Science, Hanyang University, Ansan 425-791, KOREA
Seok Namkung
Affiliation:
Dept of Metallurgy and Materials Science, Hanyang University, Ansan 425-791, KOREA
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Abstract

An optimum route to fabricate the Al2O3/Ni-Fe alloy nanocomposites with sound microstructure and magnetic propertieswas investigated. The composites were fabricated by the hot pressing of powder mixtures of Al2O3 and nano-sized Ni-Fe alloy, in which the alloy was prepared by solution-chemistry routes using Ni- and Fe-nitrate powders and a subsequent hydrogen reduction process. Microstructural observation of reduced powder mixture revealed that the Ni-Fe alloy particles of about 20 nm in size were homogeneously surrounded Al2O3, forming nanocomposite powder. The hot-pressed composite showed improved mechanical properties and magnetic response. The properties are discussed in terms of microstructural characteristics such as the distribution and size of Ni-Fe dispersion.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 676: Symposium Y – Synthesis, Functional Properties and Applications of Nanostructures , 2001 , Y8.40
Copyright
Copyright © Materials Research Society 2001

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References

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