| 添加Nb对Nd—Fe—B磁体温度稳定性的影响 |
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| 引用本文： | 成问好,李卫,李传健.添加Nb对Nd—Fe—B磁体温度稳定性的影响[J].金属学报,2001,37(1):87-90. |
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| 作者姓名： | 成问好 李卫 李传健 |
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| 作者单位： | 钢铁研究总院功能材料研究所,北京100081 |
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| 基金项目： | 国家自然科学基金!50071051 |
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| 摘 要： | 对Nd15.15Fe78.11-xNbxB6.74(x=0,0.21,0.42,0.72,1.08,1.44)永磁体的温度特性和显微组织及两者之间的关系进行了研究，结果表明：Nb可以显著降低磁体的磙这不可逆损失，但对磁体磁通可逆部分几乎没有影响，Nb对Nd-Fe-B磁体中的作用是使晶粒均匀化，规则化，导致晶粒表面层厚度r0大幅度变薄，晶粒表面的最小形核场H11和Bloch壁的挣脱钉扎场HN增大，因而使磁体的不可逆损失降低，温度稳定性和使用温度提高。
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| 关 键 词： | ND－FE－B永磁体 显微组织 温度稳定性 铌 |
| 文章编号： | 0412-1961(2001)01-0087-04 |
| 修稿时间： | 2000年7月3日 |
EFFECT OF Nb ADDITION ON THE TEMPERATURE CHARACTERISTICS OF THE SINTERED Nd-Fe-B MAGNETS |
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| CHENG Wenhao,LI Wei,LI Chuanjian.EFFECT OF Nb ADDITION ON THE TEMPERATURE CHARACTERISTICS OF THE SINTERED Nd-Fe-B MAGNETS[J].Acta Metallurgica Sinica,2001,37(1):87-90. |
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| Authors: | CHENG Wenhao LI Wei LI Chuanjian |
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| Abstract: | The temperature characteristic and microstructure of the sintered Nd15.15Fe78.11-x- NbxB6.74 magnets and their relation have been investigated. It is found that the irreversible magnetic flux loss decreases with increasing Nb content, but the reversible part of magnetic flux loss was hardly affected by Nb addition. Nb addition leads to the homogenization and regularization of the grain of the main phase Nd2Fe14B and decreases the thickness of the Nd-rich boundary phase between main phase, which increases the minimum nucleation field Hn at the surface of the grain and the depinning field HN of Bloch wall. |
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| Keywords: | Nd-Fe-B permanent magnet temperature characteristic microstructure |
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