On the Squareness Factor Behavior of RE-FeB (RE = Nd or Pr) Magnets Above Room Temperature

被引：31
|
作者：
Perigo, E. A. [1 ]
Takiishi, H. [1 ]
Motta, C. C. [2 ]
Faria, R. N. [1 ]
机构：
[1] Nucl & Energy Res Inst, BR-05508000 Sao Paulo, Brazil
[2] Univ Sao Paulo, BR-05508000 Sao Paulo, Brazil
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2009年 / 45卷 / 10期
基金：
巴西圣保罗研究基金会;
关键词：
NdFeB; PrFeB; sintered magnets; squareness factor; B SINTERED MAGNETS; PERMANENT-MAGNETS; MICROSTRUCTURE; COERCIVITY; ND16FE76B8; SYSTEM; FIELD; ADDITIONS; NDFEB;
D O I：
10.1109/TMAG.2009.2025190
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The magnetic stability of RE-FeB (RE = Nd or Pr) sintered magnets above room temperature was investigated by monitoring the squareness factor (SF). At 293 <= T <= 423 K, commercial anisotropic NdFeB-based sintered magnets with a Curie temperature (T(c)) of around 585 K showed no appreciable change in their squareness factors. This indicates that the SF is controlled mainly by the samples' microstructural features. Magnets with T(c) > 593 K showed a tendency for improved squareness factor at higher temperatures due to the methodology employed to characterize the SF. On the other hand, PrFeCoBCuNb sintered magnets with T(c) > 593 K presented a reduction in the SF with temperature rising from 298 to 373 K.
引用
收藏
页码：4431 / 4434
页数：4
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