FACTORS CONTROLLING THE COERCIVITY OF ND-FE-B TYPE PERMANENT-MAGNETS

被引：7
|
作者：
TANG, WH
ZHOU, SZ
WANG, R
机构：
[1] Beijing Univ of Iron & Steel, Technology, China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1988年 / 75卷 / 03期
关键词：
Magnetic Materials - Magnetization;
D O I：
10.1016/0304-8853(88)90053-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The variations of coercivity of Nd-Fe-B type permanent magnets have been investigated. It is shown that there exists a simple relation among the coercivity of annealed Nd-Fe-B magnets Hc, the anisotropy field HA and the spontaneous magnetization Is of the hard magnetic Nd2Fe14B phase: μ0Hc=Ne(μ0kHA-NiIs), where k and Ni are two constants related to the completeness of the Nd2Fe14B grain surface layers and the local demagnetization fields of isolated grains, respectively, and Nc is a parameter describing the magnetic interactions between the Nd2Fe14B grains. It is estimated that the values of k and Ni are about 0.6 and 1.8, respectively, and that the coercivity of an isolated Nd2Fe14B grain is about 2 T at room temperature.
引用
收藏
页码：416 / 420
页数：5
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