Magnetic hardening of melt-spun nanocomposite Nd2Fe14B/Fe magnets

被引：34

作者：

Panagiotopoulos, I ^{[1
]}

Withanawasam, L ^{[1
]}

Murthy, AS ^{[1
]}

Hadjipanayis, GC ^{[1
]}

Singleton, EW ^{[1
]}

Sellmyer, DJ ^{[1
]}

机构：

[1] UNIV NEBRASKA,LINCOLN,NE 68588

来源：

JOURNAL OF APPLIED PHYSICS | 1996年 / 79卷 / 08期

关键词：

D O I：

10.1063/1.361621

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Coercivity optimization studies were done on melt-spun nanocomposite Nd(4)R(2)Fe(87-x)NbT(x)B(6) (R=Nd,Y,Dy; T=Ag,Cu) isotropic ribbon samples. The maximum attainable coercivities, after adjusting the annealing time, were found to be very sensitive to the annealing temperatures. The optimum magnetic properties [H-c=3.9 kOe, (BH)(max)=10 MGOe] were obtained by annealing at 750-775 degrees C for a few minutes. Optimization by flash annealing gave similar results. Microstructural studies show that the grain size is greater than the theoretically predicted grain size for optimum coupling between the hard and the soft phase. With the annealing conditions used, Nd4Dy2Fe87NbB6 samples gave moderate coercivities and in Nd4Y2Fe87NbB6 samples the coercivity was reduced more than the expected reduction in the anisotropy field due to the presence of Y. (C) 1996 American institute of Physics.

引用

页码：4827 / 4829

页数：3

共 6 条

[1] THE EXCHANGE-SPRING MAGNET - A NEW MATERIAL PRINCIPLE FOR PERMANENT-MAGNETS [J].