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Microstructure Analysis of Melt Spun FeN foils with α''-Fe16N2 Phase

Published online by Cambridge University Press:  03 May 2016

Md A Mehedi ,
Yanfeng Jiang  and
Jian-Ping Wang
Md A Mehedi
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Minneapolis, Minnesota, United States
Yanfeng Jiang
Affiliation:
Department of Electrical and Computer Engineering, University of Minnesota Twin Cities, Minneapolis, Minnesota, United States
Jian-Ping Wang*
Affiliation:
Department of Electrical and Computer Engineering, University of Minnesota Twin Cities, Minneapolis, Minnesota, United States
*
*Corresponding Author: jpwang@umn.edu
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Abstract

We are reporting an approach to prepare bulk foils of α″-Fe16N2 that can be directly obtained from a melt spinning process. The diffraction peaks from α″-Fe16N2 phase were found in X-ray diffraction spectrum of the foil, for which a nitrogen composition of 8.7at% was found by Auger electron spectroscopy. The microstructure of this melt spun foil was analyzed. We found 600 nm subgrains inside 8 μm grains for this foil. The coercivity of the α″-Fe16N2 foil was found as 222 Oe with a saturation magnetization of 223 emu/g. We analyzed the coercivity based on the microstructure and proposed a model to explain how to further improve it in melt spun FeN foils.

Keywords

magnetic propertiesferromagneticnanostructure

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Type
Articles
Information
MRS Advances , Volume 1 , Issue 34: Materials Design , 2016 , pp. 2373 - 2378
Copyright
Copyright © Materials Research Society 2016 

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