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SPS制備SmCo7-xFex塊狀納米晶磁體的研究
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國家自然科學基金(50201001)；北京市自然科學基金重點項目(2041001)；國家高新技術(shù)研究發(fā)展計劃項目(2007AA03Z458)


Bulk Nanocrystalline SmCo7-xFex Sintered Magnets Prepared by Spark Plasma Sintering
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    摘要:

    采用高能球磨法制得SmCo7-xFex非晶粉末，然后采用放電等離子技術(shù)將其燒結(jié)為塊狀納米晶磁體，對磁體的微觀結(jié)構(gòu)和磁性能進行了觀察和測試。結(jié)果表明，SmCo7-xFex球磨5 h后成為非晶粉末，經(jīng)SPS燒結(jié)后得到1:7相。TEM觀察表明，磁體晶粒尺寸在20~50 nm。另外，磁體具有較好的磁性能，當x=0.4時，矯頑力為992.8 kA/m,剩磁為0.634 T，(BH)max為69.75 kJ/m3。

    Abstract:

    SmCo7-xFex(x=0, 0.4, 1, 2) amorphous powders prepared by high-energy milling were sintered into bulk nanocrystalline magnets using spark plasma sintering technique (SPS). XRD patterns show that the powder becomes amorphous after milled for 5 h; and the magnet exhibits stable TbCu7 structure after sintered by SPS. TEM observation indicates that the microstructure of the magnet is composed of SmCo7-xFex single phase grains with an average grain size of 20~50 nm. Magnetic measurement shows that the SmCo6.6Fe0.4 magnet has the magnetic properties as following: iHc=992.8 kA/m，Br=0.634 T, and (BH)max=69.75 kJ/m3.

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潘利軍,張東濤,岳 明,李揚超,許 剛,張久興. SPS制備SmCo7-xFex塊狀納米晶磁體的研究[J].稀有金屬材料與工程,2009,38(1):161~163.[Pan Lijun, Zhang Dongtao, Yue Ming, Li Yangchao, Xu Gang, Zhang Jiuxing. Bulk Nanocrystalline SmCo7-xFex Sintered Magnets Prepared by Spark Plasma Sintering[J]. Rare Metal Materials and Engineering,2009,38(1):161~163.]
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  • 收稿日期:2008-01-27
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