Temperature stability and microstructure of ultra-high intrinsic coercivity Nd-Fe-B magnets

稀有金属（英文版）, 2008, 27(4): 358-361.

^1, , ^2, , ^3, , ^4, , ^5,

1.Key Laboratory of the Ministry of Education of China for Anisotropy and Texture of Materials,Northeastern University,Shenyang 110004,China;Division of Functional Materials,Central Iron & Steel Research Institute,Beijing 100081,China

2.Advanced Technology and Materials Co.Ltd.,Beijing 100081,China

3.Division of Functional Materials,Central Iron & Steel Research Institute,Beijing 100081,China

4.Division of Functional Materials,Central Iron & Steel Research Institute,Beijing 100081,China

5.Key Laboratory of the Ministry of Education of China for Anisotropy and Texture of Materials,Northeastern University,Shenyang 110004,China

基金项目: 国家高技术研究发展计划(863计划)(2007AA03ZA38) 国家自然科学基金(50571028) Beijing Municipal Science & Technology Commission,China(D0406002000091)

Temperature stability and microstructure of ultra-high intrinsic coercivity Nd-Fe-B magnets

HU Zhihua ^1, , CHENG Xinghua ^2, , ZHU Minggang ^3, , LI Wei ^4, , LIAN Fazeng ^5,

2.Advanced Technology and Materials Co.Ltd.,Beijing 100081,China

3.Division of Functional Materials,Central Iron & Steel Research Institute,Beijing 100081,China

4.Division of Functional Materials,Central Iron & Steel Research Institute,Beijing 100081,China

5.Key Laboratory of the Ministry of Education of China for Anisotropy and Texture of Materials,Northeastern University,Shenyang 110004,China

Keywords： Nd-Fe-B magnets

The variations of intrinsic coercivity and remanence of sintered Nd-Fe-B magnets with ultra-high intrinsic coercivity were investigated.The results showed that the intrinsic coercivity and remanence declined simultaneously with increasing temperature,but the squareness of the magnets has hardly been changed.The temperature coefficients of remanence (α) and coercivity (β) for the magnets were calculated by two different methods,and the variations of the temperature coefficients and the microstructure of sintered Nd-Fe-B magnets were analyzed.The temperature coefficients of remanence (α) and coercivity (β) for the sintered magnets are very small,and the existence of free microstructure is necessary to obtain sintered Nd-Fe-B magnets with ultra-high intrinsic coercivity.

参考文献

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Temperature stability and microstructure of ultra-high intrinsic coercivity Nd-Fe-B magnets

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