Preparation and magnetic properties of melt-spinning Nd2Fe14B α-Fe nanocomposite magnets

被引：0

作者：

Wang, W ^{[1
]}

Ni, JS ^{[1
]}

Xu, H ^{[1
]}

Zhou, BX ^{[1
]}

Li, Q ^{[1
]}

Wang, ZY ^{[1
]}

机构：

[1] Shanghai Univ, Inst Mat, Res Ctr Nanosci & Nanotechnol, Shanghai 200072, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2004年 / 22卷 / 04期

关键词：

nanocomposite magnets; melt spinning; exchange coupling; rare earths;

D O I：

暂无

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Nd11Fe71Co8V1.5Cr1B7.5 magnet was prepared by melt-spinning and subsequently annealed. The effects of the wheel speed on the magnetic properties and microstructure were studied. The results reveal that fine nanocomposite microstructure consisting of Nd2Fe14B and alpha-Fe phases can be developed at an optimum wheel speed of about 21 m(.)s(-1). After optimal annealing (640 degreesC x 4 min), magnetic properties of B-r=0.64 T, H-j(c) = 903.5 kA(.)m(-1) and (BH)(max) = 71 kJ(.)m(-3) were obtained for the bonded magnets. The addition of Cr element significantly reduces grain size, increasing the intrinsic coercivity and maximum magnetic energy product.

引用

页码：505 / 508

页数：4

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