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高壓技術(shù)對(duì)燒結(jié)NdFeB性能和微觀結(jié)構(gòu)的影響
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四川省科技廳科技支撐計(jì)劃 (2011SZZ029, 2012JY0045)；四川省教育廳重點(diǎn)項(xiàng)目 (10ZA060, 11ZA161)；綿陽(yáng)市科技局重點(diǎn)項(xiàng)目(10Y002-4)；綿陽(yáng)師范學(xué)院學(xué)科專項(xiàng) (2011C02)


Effects of High Pressure Process on the Microstructure and Performances of NdFeB Magnets
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    摘要:

    采用高壓和常規(guī)壓制方式制備了燒結(jié) (PrNd)33Al0.7Nb0.6Cu0.1B1.05Febal (質(zhì)量分?jǐn)?shù)) 永磁體，利用掃描電鏡、金相顯微鏡和振動(dòng)樣品磁強(qiáng)計(jì)及維氏硬度計(jì)對(duì)比研究了兩種壓制方式對(duì)樣品微觀組織和性能的影響。結(jié)果發(fā)現(xiàn)：與常規(guī)壓制方式制備樣品相比，1.8 GPa壓強(qiáng)成型制備樣品的Hcj和(BH)max分別提高了133 kA.m-1和0.6 kJ.m-3；而3.6 GPa壓強(qiáng)成型制備樣品的Hcj和(BH)max分別提高了120.3 kA.m-1和3.2 kJ.m-3。高壓樣品的主相晶粒較細(xì)小，富稀土相分布均勻合理，但過(guò)高的壓強(qiáng)將使其維氏硬度降低

    Abstract:

    The sintered permanent magnets of (PrNd)33Al0.7Nb0.6Cu0.1B1.05Febal (wt%) were prepared by the high pressure and conventional molding processes. The performances and microstructure were discussed by metalloscope, VSM, SEM and so on. The results show that the Hcj and (BH)max of the samples by high pressure process (1.8 and 3.6 GPa) are much higher (133 kA·m-1 and 0.6 kJ·m-3; 120.3 kA·m-1 and 3.2 kJ·m-3) than those by the conventional pressure process. On the other hand, the former crystalline grains of NdFeB phase are thin and small. In addition, the former Nd-rich phases are homogeneous and reasonable, but too high pressure will decrease Vickers hardness of samples

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唐 杰,張 林,魏成富,楊梨容,趙導(dǎo)文.高壓技術(shù)對(duì)燒結(jié)NdFeB性能和微觀結(jié)構(gòu)的影響[J].稀有金屬材料與工程,2012,41(6):1060~1064.[Tang Jie, Zhang Lin, Wei Chengfu, Yang Lirong, Zhao Daowen. Effects of High Pressure Process on the Microstructure and Performances of NdFeB Magnets[J]. Rare Metal Materials and Engineering,2012,41(6):1060~1064.]
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  • 收稿日期:2011-06-08
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