Modified HDDR Process for Producing Anisotropic NdFeB Powders

Xubo Liu; Yue Ming; Yaofu Xiao; Qi Zeng; Zhengyi Zhang; Run Wang

Volume 8 Issue 2

Jun. 2001

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文章导航 > 矿物冶金与材料学报（英文版） > 2001 > 8(2) : 111-114.

Cite this article as:

Xubo Liu, Yue Ming, Yaofu Xiao, Qi Zeng, Zhengyi Zhang, and Run Wang, Modified HDDR Process for Producing Anisotropic NdFeB Powders, J. Univ. Sci. Technol. Beijing , 8(2001), No. 2, pp.111-114.

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Materials

Modified HDDR Process for Producing Anisotropic NdFeB Powders

Xubo Liu¹⁾,
Yue Ming¹⁾,
Yaofu Xiao¹⁾,
Qi Zeng²⁾,
Zhengyi Zhang¹⁾,
Run Wang¹⁾

Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China
Beijing Institute of Aeronautical Materials, Beijing 100095, China

基金项目:

supported by the National Advanced Material Committee of China(NAMCC, No.715-Z37-02)

通信作者:

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- 文章访问数: 285
- HTML全文浏览量: 96
- PDF下载量: 20

中文摘要

The effect of HDDR (hydrogenation-decomposition-desorption-recombination process) treating conditions on magnetic anisotropy of Nd₁₃Fe_balCo₁₇B₇Ga₁Zr_0.1 powders has been studied. It is found that increasing recombination temperature is effective for magnetic anisotropy formation, but at the cost of reducing the coercive force. The microstructure analysis (TEM) indicates that the NdFeB recombination nucleation takes place markedly during the transition range from decomposition stage to recombination stage, in which both temperature and H₂ pressure change sharply. In order to create a more stable treatment condition for recombination nucleation, a modified HDDR process is established in which the conventional continuous transition range is divided into several stages. The experimental results have proved that such a process can effectively enhance the remanence of the magnet powders with high certainty, while only cause a little reduction in coercivity.

关键词:

HDDR ;
anisotropy ;
NdFeB

Materials

Modified HDDR Process for Producing Anisotropic NdFeB Powders

Xubo Liu¹⁾,
Yue Ming¹⁾,
Yaofu Xiao¹⁾,
Qi Zeng²⁾,
Zhengyi Zhang¹⁾,
Run Wang¹⁾

Author Affilications

Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China
Beijing Institute of Aeronautical Materials, Beijing 100095, China

Funds:
supported by the National Advanced Material Committee of China(NAMCC, No.715-Z37-02)
Received: 19 August 2000;

Abstract:

Keywords:

HDDR ;
anisotropy ;
NdFeB

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