HIGH MAGNETIC COERCIVITY DUE TO A NEW PHASE IN CAST EUTECTIC FE-ND ALLOYS

被引：40

作者：

SCHNEIDER, G

MARTINEK, G

STADELMAIER, HH

PETZOW, G

机构：

[1] MAX PLANCK INST MET RES,INST PHYS,D-7000 STUTTGART 80,FED REP GER

[2] N CAROLINA STATE UNIV,DEPT MAT SCI & ENGN,RALEIGH,NC 27695

来源：

MATERIALS LETTERS | 1988年 / 7卷 / 5-6期

关键词：

Crystals--Microstructure - Magnetic Measurements - Metal Melting--Plasma Arc - Metallography--Eutectics;

D O I：

10.1016/0167-577X(88)90014-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Arc melted Fe+80 at.% Nd and similar alloys develop intrinsic coercivities as high as 400 kA/m (5.0 kOe) in the as-cast condition. This property is attributed to a fine-grained eutectic microstructure in which the magnetically hard phase containing 20 at. % Nd, is stabilized by oxygen and has a Curie temperature of 235°C. The high coercivity in these alloys confirms that Nd containing 7% Fe has a coercive field of 4300 Oe and also explains the high coercivity of melt-spun ribbons of boron-free Fe-Nd, which can now be correlated with bulk Fe-Nd alloys by X-ray diffraction and Curie temperature. The eutectic also extends into Fe-Nd-B alloys, and replaces the regular eutectic containing Fe14Nd2B.

引用

页码：215 / 218

页数：4

共 8 条

[1] MAGNETIC HARDENING OF PR-FE AND ND-FE ALLOYS BY MELT-SPINNING [J].