2Co17納米晶復(fù)合磁粉,研究了MnBi合金添加量對(duì)復(fù)合磁體磁性能和微結(jié)構(gòu)的影響。隨著MnBi合金添加量的增加,復(fù)合磁粉的內(nèi)稟矯頑力先稍上升,后基本保持不變,但均低于純MnBi磁粉的10.8 kOe；磁粉的飽和磁化強(qiáng)度和剩余磁化強(qiáng)度均逐漸下降。復(fù)合磁粉中沒(méi)有發(fā)現(xiàn)明顯的元素互擴(kuò)散現(xiàn)象。采用Henkel曲線分析了復(fù)合磁體的交換耦合作用,復(fù)合磁粉的δM在添加量為15wt. %時(shí)達(dá)到極大值,說(shuō)明該復(fù)合磁體具有較強(qiáng)的交換耦合作用,結(jié)合磁粉形貌分析了隨著MnBi合金添加量的增加復(fù)合磁粉剩磁比演變規(guī)律的原因。"/>

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MnBi/Sm2Co17復(fù)合磁粉制備、磁性能及微結(jié)構(gòu)研究
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1.中國(guó)計(jì)量大學(xué);2.浙江中元磁業(yè)股份有限公司

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國(guó)家青年基金(51801196)；國(guó)家重點(diǎn)研發(fā)計(jì)劃,The National Key Research and Development Project ,(2019YFF0217203)；國(guó)家自然科學(xué)基金 (51871205).


Shan Jiefeng 1, Yu Nengjun1, Zhang Suyin1, Jin Xiangyang2, Wu Qiong1, Zhang Pengyue1, Ge Hongliang1
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    摘要:

    采用化學(xué)輔助高能球磨工藝制備了MnBi/Sm2Co17納米晶復(fù)合磁粉,研究了MnBi合金添加量對(duì)復(fù)合磁體磁性能和微結(jié)構(gòu)的影響。隨著MnBi合金添加量的增加,復(fù)合磁粉的內(nèi)稟矯頑力先稍上升,后基本保持不變,但均低于純MnBi磁粉的10.8 kOe；磁粉的飽和磁化強(qiáng)度和剩余磁化強(qiáng)度均逐漸下降。復(fù)合磁粉中沒(méi)有發(fā)現(xiàn)明顯的元素互擴(kuò)散現(xiàn)象。采用Henkel曲線分析了復(fù)合磁體的交換耦合作用,復(fù)合磁粉的δM在添加量為15wt. %時(shí)達(dá)到極大值,說(shuō)明該復(fù)合磁體具有較強(qiáng)的交換耦合作用,結(jié)合磁粉形貌分析了隨著MnBi合金添加量的增加復(fù)合磁粉剩磁比演變規(guī)律的原因。

    Abstract:

    The MnBi/Sm2Co17 composite powder was prepared by chemically assisted high-energy ball milling process, and the effect of the content of MnBi alloy on the magnetic properties and microstructure of the composite powder has been studied. As the content of MnBi alloy increases, the coercivity of the composite powder first increases slightly, and then keep stable at about 8.0 kOe, while coercivity of all the composite powder was lower than 10.8 kOe of pure MnBi milled powder; the saturation magnetization and remanent magnetization of the composite powder gradually decreased. No obvious elements interdiffusion was found in the composite magnetic powder. The exchange coupling effect of the composite powder was analyzed by the Henkel curve. The δM of the composite magnetic powder reaches the maximum value when the MnBi addition amount was 15wt.%, indicating that the composite powder has a strong exchange coupling effect. The evolution of the remanence ratio of the composite magnetic powder with the increase of MnBi alloy content has been analyzed depending on the morphology and the exchange coupling effect of the composite magnetic powder.

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單杰鋒,俞能君,張素銀,金向陽(yáng),吳瓊,張朋越,葛洪良. MnBi/Sm2Co17復(fù)合磁粉制備、磁性能及微結(jié)構(gòu)研究[J].稀有金屬材料與工程,2021,50(4):1448~1454.[shanjiefeng, yunengjun, zhangsuyin, jinxiangyang, wuqiong, zhangpengyue, gehongliang. Shan Jiefeng 1, Yu Nengjun1, Zhang Suyin1, Jin Xiangyang2, Wu Qiong1, Zhang Pengyue1, Ge Hongliang1[J]. Rare Metal Materials and Engineering,2021,50(4):1448~1454.]
DOI：10.12442/j. issn.1002-185X.20200403

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  • 收稿日期:2020-06-10
  • 最后修改日期:2020-07-15
  • 錄用日期:2020-07-21
  • 在線發(fā)布日期: 2021-05-08
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