Magnetic softening of Co doped α"-Fe16N2 containing residual Fe-Co alloy prepared in low temperature nitridation

MASUBUCHI, Yuji; SATO, Hiroaki; MOTOHASHI, Teruki; KIKKAWA, Shinichi

doi:10.2109/jcersj2.122.288


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Magnetic softening of Co doped α"-Fe16N2 containing residual Fe-Co alloy prepared in low temperature nitridation

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Title:	Magnetic softening of Co doped α"-Fe16N2 containing residual Fe-Co alloy prepared in low temperature nitridation
Authors:	MASUBUCHI, Yuji Browse this author →KAKEN DB
	SATO, Hiroaki Browse this author
	MOTOHASHI, Teruki Browse this author
	KIKKAWA, Shinichi Browse this author
Keywords:	Iron nitride
	α"-Fe16N2
	Ammonolysis
	Magnetic coercivity
	XRD
	XAFS
Issue Date:	1-Apr-2014
Publisher:	Ceramic Society of Japan
Journal Title:	Journal of the Ceramic Society of Japan
Volume:	122
Issue:	1424
Start Page:	288
End Page:	291
Publisher DOI:	10.2109/jcersj2.122.288
Abstract:	Preparation and magnetic properties were investigated on the Co doped α′′-Fe16N2 obtained in low temperature nitridation of bcc Fe1−xCox alloys to change its magnetic coercivity. The alloys were prepared by the reduction of (Fe1−xCox)3O4 obtained by hydrolysis of iron and cobalt acetylacetonate mixture in benzyl alcohol. Fine powder of the pure spinel-type (Fe1−xCox)3O4 was obtained in x = 0–0.05. The oxides were reduced to bcc Fe1−xCox alloy at 400°C in H2 gas and then nitrided at 150°C for 5 or 8 h under NH3 gas flow. XRD and X-ray absorption spectroscopy suggested the nominal “α′′-(Fe1−xCox)16N2”, similar to “α′′-Fe16N2” was obtained as a mixture with the residual bcc Fe1−xCox alloy at x = 0.03 as in the case of the nitrided product without cobalt. The present nitrided product exhibited a larger magnetization of 217 Am2 kg−1 and a smaller magnetic coercivity of 30 mT at x = 0.03 than those for the present products without the Co doping.
Rights:	https://creativecommons.org/licenses/by-nd/4.0/deed.ja
Type:	article
URI:	http://hdl.handle.net/2115/73096
Appears in Collections:	工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鱒渕友治

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