Effects of the precursor ingot for Nd2Fe14B/alpha-Fe nanocomposite magnets prepared by mechanical milling

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	Effects of the precursor ingot for Nd2Fe14B/alpha-Fe nanocomposite magnets prepared by mechanical milling
	C. Y. You; X. K. Sun; L. Y. Xiong; W. Liu; B. Z. Cui; X. G. Zhao; D. Y. Geng; Z. D. Zhang
	2004
发表期刊	Journal of Magnetism and Magnetic Materials
ISSN	0304-8853
卷号	268 期号:3 页码:403-409
摘要	The nanocomposite Nd8.0Fe88.0-xCoxB4.0 (X = 0, 5.4) magnets are prepared by mechanically milling mixtures of the alloy powder and alpha-Fe powder. Compared with the results of the two kinds of magnets with the same nominal composition, it is found that using an Fe-rich ingot in the preparation process is useful for improving magnetic properties. The positron annihilation studies show two kinds of interface structures in the magnets: one of short lifetime is related to the free volume with a single-vacancy size; one of longer lifetime is related to a porous atomic structure. Use of the Fe-rich ingot in the preparation process produces a relatively compact interface structure, resulting in improvement of magnetic properties due to the enhancement of the exchange coupling. A proper Co substitution for Fe enhances the exchange coupling between the soft and hard magnetic phases, thus making magnetic properties better. (C) 2003 Elsevier B.V. All rights reserved.
部门归属	chinese acad sci, inst met res, magnetism & magnet mat div, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;you, cy (reprint author), chinese acad sci, inst met res, magnetism & magnet mat div, shenyang natl lab mat sci, shenyang 110016, peoples r china
关键词	Nanocomposite Magnets Coercivity Interfacial Structure Exchange Coupling Positron Lifetime Positron-lifetime Remanence Co Fe Enhancement Additions Powders Alloys
URL	查看原文
WOS记录号	WOS:000186841900018
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35687
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	C. Y. You,X. K. Sun,L. Y. Xiong,et al. Effects of the precursor ingot for Nd2Fe14B/alpha-Fe nanocomposite magnets prepared by mechanical milling[J]. Journal of Magnetism and Magnetic Materials,2004,268(3):403-409.
APA	C. Y. You.,X. K. Sun.,L. Y. Xiong.,W. Liu.,B. Z. Cui.,...&Z. D. Zhang.(2004).Effects of the precursor ingot for Nd2Fe14B/alpha-Fe nanocomposite magnets prepared by mechanical milling.Journal of Magnetism and Magnetic Materials,268(3),403-409.
MLA	C. Y. You,et al."Effects of the precursor ingot for Nd2Fe14B/alpha-Fe nanocomposite magnets prepared by mechanical milling".Journal of Magnetism and Magnetic Materials 268.3(2004):403-409.