Ga对HDDR磁粉热变形磁体磁性能和微观结构的影响

功能材料, 2010, 41(4): 591-597.

Ga对HDDR磁粉热变形磁体磁性能和微观结构的影响

赖彬 ^1, , 王会杰 ^2, , 赵睿 ^3, , 张文臣 ^4, , 潘伟 ^5,

1.钢铁研究总院,功能材料研究所,北京,100081

2.钢铁研究总院,功能材料研究所,北京,100081

3.钢铁研究总院,功能材料研究所,北京,100081

4.钢铁研究总院,功能材料研究所,北京,100081

5.钢铁研究总院,功能材料研究所,北京,100081

基金项目: 国家自然科学基金资助项目(50801014;50771035) 国家高技术研究发展计划(863计划)资助项目(2007AA03Z400;2007AA03Z100)

关键词： HDDR工艺 , 热压/热变形 , 微观结构 , 各向异性

Effects of Ga additions on magnetic performance and microstructure of die-upset magnets

利用HDDR工艺制备出Nd32FebalBGax(x=0.0、0.2%、0.4%、0.6%、0.8%(质量分数))磁粉,并且对HDDR磁粉进行热压/热变形处理制备出全密度各向异性磁体.研究了热变形温度和Ga含量对Nd-Fe-B热变形磁体磁性能的影响,观测了不同Ga含量热变形磁体的微观结构,探讨了微量元素Ga的添加对用HDDR磁粉制备的热变形磁体微观结构和磁性能的影响机制.研究发现,Ga的添加能够明显减小热变形磁体的主相晶粒尺寸,改善磁体的微观织构,并可以同时提高热变形磁体的剩磁和矫顽力.当Ga含量为0.6%(质量分数)时,热变形磁体的磁能积达到最大值228.3kJ/m3.

参考文献

[1]	Nakayama R;Takeshita T .[J].Journal of Alloys and Compounds,1993,193(1-2):259-261.
[2]	Takeshita T.;Morimoto K. .ANISOTROPIC ND-FE-B BONDED MAGNETS MADE FROM HDDR POWDERS[J].Journal of Applied Physics,1996(8 Pt.2a):5040-5044.
[3]	Gutfleisch O.;Harris IR. .FUNDAMENTAL AND PRACTICAL ASPECTS OF THE HYDROGENATION, DISPROPORTIONATION, DESORPTION AND RECOMBINATION PROCESS[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,1996(9):2255-2265.
[4]	喻晓军,张继凯.HD和HDDR方法对稀土铁基化合物磁特性的影响[J].金属功能材料,1997(01):18.
[5]	K. Mori;R. Nakayama;K. Morimoto .Magnetic Properties of Nd-Fe-B HDDR Thin Hot Pressed Magnet[J].IEEE Transactions on Magnetics,2005(10):3796-3798.
[6]	Gutfleisch O.;Grunberger W.;Hinz D.;Nagel H.;Thompson P. Chapman JN.;Muller KH.;Schultz L.;Harris IR.;Kirchner A. .Textured NdFeB HDDR magnets produced by die-upsetting and backward extrusion[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,1998(7):807-811.
[7]	Saito T.;Kuji T.;Fukuoka K.;Syono Y.;Fujita M. .The development of high performance Nd-Fe-Co-Ga-B die upset magnets[J].Journal of Applied Physics,1998(11 Pt.2):6390-6392.
[8]	Zhu Minggang;Li Wei;Zhang Jingjing et al.[J].Materials Science Forum,2005,475-479:2147-2150.
[9]	李卫;朱明刚 .[J].中国有色金属学报,2004,14:F01.
[10]	朱明刚,李卫,李岫梅,郭永权.纳米复合Nd4.5（Fe,Ga,Co）77.5B18磁体的矫顽力和交换耦合作用[J].金属学报,2003(02):217-220.
[11]	Gutfleisch O.;Bollero A.;Handstein A.;Hinz D.;Kirchner A.;Yan A. Muller KH.;Schultz L. .Nanocrystalline high performance permanent magnets[J].Journal of Magnetism and Magnetic Materials,2002(2):1277-1283.
[12]	Harris I R;McGuiness P J;Hydrogen .[J].Journal of the Less-Common Metals,1991,174:1273-1284.
[13]	Jurczyk M;Gebel B;Gutfleisch O;Muller KH;Jakubowicz J .Nd sub 2 (Fe,Co,M) sub 14 B-type magnet powders produced by the HDDR process[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):296-300.
[14]	D. N. Brown;B. Smith;B. M. Ma;P. Campbell .The Dependence of Magnetic Properties and Hot Workability of Rare Earth-Iron-Boride Magnets Upon Composition[J].IEEE Transactions on Magnetics,2004(4):2895-2897.
[15]	Endoh M.;Tokunaga M. .Magnetic properties of Ga-added die-upset Nd-Fe-B magnets[J].IEEE Transactions on Magnetics,1989(5):4114-4116.
[16]	Yoshida Y;Kasai Y;Watanabe T et al.[J].Journal of Applied Physics,1991,69(08):5841-5843.
[17]	Grunberger W;Hinz D;Kirchner A et al.[J].Journal of Alloys and Compounds,1997,257:293-301.

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