Crystallization and magnetic properties of melt-spun two-phase nanocrystalline Nd-Fe-B alloy

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	Crystallization and magnetic properties of melt-spun two-phase nanocrystalline Nd-Fe-B alloy
	S. D. Li; W. S. Sun; M. X. Quan
	1997
发表期刊	Materials Letters
ISSN	0167-577X
卷号	30 期号:5-6 页码:351-355
摘要	A new type of permanent magnet alloy with composition Nd9.32Fe85.32B5.36 has been prepared by a melt spinning method. After optimized annealing of the initial amorphous alloy, high magnetic properties are obtained in the isotropic specimens. Remanence, energy product and intrinsic coercivity are 1.09 T, 153.6 kJ m(-3) and 400 kA m(-1), respectively. The samples consist of two phases, a matrix of nanometer-sized hard magnetic Nd2Fe14B phase (about 40 nm) together with numerous alpha-iron particles (about 20 nm) embedded in it. The crystallization behavior for amorphous samples has been studied. The results indicate that the Lu-iron initially precipitates from the amorphous matrix, and at higher annealing temperatures the crystallization of the Nd2Fe14B phase occurs. No metastable phase was observed in all heat treatments. Although the volume fraction of the magnetically soft alpha-iron is about 30 vol%, the second quadrant of the J-H loop is typical of a magnetically soft hard material. The role of exchange coupling between the magnetically soft grain and the magnetically hard grain is discussed.
部门归属	acad sinica,inst met res,natl key lab rsa,shenyang 110015,peoples r china.
关键词	Nd-fe-b Magnets Nanometer Two-phase Permanent Magnet Materials Exchange Coupling Remanence Enhancement Melt Spinning Rare Earth Permanent Magnetic Materials Permanent-magnets Remanence
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38003
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. D. Li,W. S. Sun,M. X. Quan. Crystallization and magnetic properties of melt-spun two-phase nanocrystalline Nd-Fe-B alloy[J]. Materials Letters,1997,30(5-6):351-355.
APA	S. D. Li,W. S. Sun,&M. X. Quan.(1997).Crystallization and magnetic properties of melt-spun two-phase nanocrystalline Nd-Fe-B alloy.Materials Letters,30(5-6),351-355.
MLA	S. D. Li,et al."Crystallization and magnetic properties of melt-spun two-phase nanocrystalline Nd-Fe-B alloy".Materials Letters 30.5-6(1997):351-355.