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Fabrication of Magnetic Iron-Hercynite Composites by Reaction Sintering

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Abstract:

Iron-hercynite composite was synthesized from Al and Fe3O4 powders by reaction sintering at ~1350oC, or by arc-melting. In reaction sintering, a three-step displacement reaction between Al and Fe3O4 was identified. In arc-melting, we observed that molten iron and hercynite segregated from each other readily. Magnetization of the extracted hercynite from the arc-melted sample was 4 emu/g, smaller than those previously reported, and this can be explained by the variations of the stoichiometric ratio and the degree of inversion of the spinel structure in the hercynite products.

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Periodical:

Key Engineering Materials (Volumes 334-335)

Pages:

309-312

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.334-335.309

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Online since:

March 2007

Authors:

K.C. Chung, Dickon H.L. Ng

Keywords:

Arc-Melting, Hercynite, Metal Matrix Composite (MMC), Reaction Sintering

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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