HIGH-PERFORMANCE SINTERED R2FE14BNX (R=ND/PR/DY) MAGNETS

被引：6

作者：

CHIN, TS ^{[1
]}

BAI, HJ ^{[1
]}

LIN, KD ^{[1
]}

KING, FD ^{[1
]}

HEH, SJ ^{[1
]}

机构：

[1] HIGH END MET CORP,HUKOU 303,TAIWAN

来源：

JOURNAL OF APPLIED PHYSICS | 1991年 / 70卷 / 10期

关键词：

D O I：

10.1063/1.349870

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-performance R2Fe14BNx-type magnets (R = Nd and/or Pr/Dy) were successfully prepared by sintering. The optimum magnetic properties are coercivity (i)H(c): 680-1440 kA/m; H(c): 500-1000 kA/m; B(r): 1.0-1.3 T; and (BH)m: 180-250 kJ/m3 depending on the composition and processing parameters, especially the proper sintering conditions, including nitrogen intake at 1040 to 1050-degrees-C. The magnets thus obtained have T(c) values of 335 to 370-degrees-C depending on the nitrogen content, which should be < 6 at. % for thermal stability. The anisotropy field increases from 6.2 to 8 T with addition of nitrogen, and magnetization measured at 2 T increases by 18%. The weight loss after immersion in a 5% HCl solution for 30 min is 25% less for nitrogenated magnets than for those without nitrogen, due to the replacement of the Nd-rich phase at grain boundaries by more corrosion-resistant nitrides.

引用

页码：6600 / 6602

页数：3