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首页> 外文期刊>IEEE Transactions on Magnetics >Effect of Soft Phase on Magnetic Properties of Bulk Sm–Co/ $alpha$–Fe Nanocomposite Magnets
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Effect of Soft Phase on Magnetic Properties of Bulk Sm–Co/ $alpha$–Fe Nanocomposite Magnets

机译：软相对块状Sm-Co / $ alpha $ -Fe纳米复合磁体磁性能的影响

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摘要

Bulk Sm–Co/$alpha$ –Fe nanocomposite magnets were fabricated by high energy ball milling and subsequent quick hot-pressing. Three different parameters were investigated which are soft phase content, type, and distribution. The effect of Fe soft phase content on the magnetic properties of the final bulk samples was examined. Increasing the Fe content significantly increased the saturation magnetization but at the cost of reduced coercivity. The optimum Fe addition for the highest maximum energy product was determined to be 15 wt% under the present processing conditions. Besides pure Fe a ${hbox {Fe}}_{49}{hbox {Co}}_{49}{hbox {V}}_{2}$ powder was also studied as a soft phase addition. The results indicated that FeCoV powder was more readily alloyed with the Sm–Co phase during the milling procedure. For the final bulk magnets, nanoscale Fe particles existed in Sm–Co matrix with pure Fe addition, but with ${hbox {Fe}}_{49}{hbox {Co}}_{49}{hbox {V}}_{2}$ addition the soft phase particles were undetectable. Two methods for adding soft phase Fe into hard phase ${hbox {SmCo}}_{5}$ were utilized. The investigation showed that milling Fe and ${hbox {SmCo}}_{5}$ together resulted in a more uniformly distributed mixture of nanoscale soft phase particles, improved squareness of the demagnetization curves of bulk nanocomposite magnets, and higher $({hbox {BH}})_{max}$ as compared to blending Fe with ${hbox {SmCo}}_{5}$.
机译：通过高能球磨和随后的快速热压制成了块状Sm-Co / $ alpha $ -Fe纳米复合磁体。研究了三个不同的参数，分别是软相含量，类型和分布。研究了铁软相含量对最终块状样品磁性能的影响。 Fe含量的增加显着增加了饱和磁化强度，但以降低矫顽力为代价。在目前的加工条件下，确定最高铁能量产品的最佳铁添加量为15 wt％。除了纯铁外，<配方公式type =“ inline”> $ {hbox {Fe}} _ {49} {hbox {Co}} _ {49} {hbox {V}} __ {2 } $ 粉末也作为软相添加物进行了研究。结果表明，在研磨过程中，FeCoV粉末更容易与Sm-Co相形成合金。对于最终的块状磁体，Sm-Co基质中存在纯Fe的纳米级Fe颗粒，但是具有<配方公式type =“ inline”> $ {hbox {Fe}} _ {49} { hbox {Co}} _ {49} {hbox {V}} _ {2} $ 另外，软相颗粒是不可检测的。使用了两种将软相铁添加到硬相中的方法。<公式> = {hbox {SmCo}} _ {5} $ 。调查显示，将Fe和 $ {hbox {SmCo}} _ {5} $ 一起研磨会导致分布更均匀纳米级软相颗粒的混合物，块状纳米复合磁体的退磁曲线的矩形性得到改善，以及更高的 $（{hbox {BH}}）_ {max} $ 与将Fe与 $ {hbox {SmCo}} _ {5} $ 混合相比。

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