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Microstructure and magnetic interactions in Pr-Fe-Co-Zr-Nb-B magnets

机译:Pr-Fe-Co-Zr-Nb-B磁体的微观结构和磁相互作用

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摘要

The microstructure and interactions between grains in Pr_9Fe_(52)Co_(13)Zr_1Nb_4B_(21) magnets produced by short time annealing (at 983 K for 5 min) of rapidly solidified samples were investigated. The specimens were produced in the form of suction-cast 1 mm diameter rods, 1 mm thick plates and 3 mm outer diameter (o.d.) tubes.The X-ray diffraction analysis and Mossbauer spectroscopy shown presence of hard magnetic Pr_2Fe_(11.2)Co_(2.8)B and paramagnetic Pr_(1+x)Fe_4B_4 crystalline phases diluted within the amorphous matrix in all samples. The microstructure was studied using TEM microscopy. Furthermore, rates of irreversible magnetization changes upon the change of external magnetic field H, were studied. In order to characterize interactions between grains of crystalline phases the δM curves were also constructed from recoil data.
机译:研究了Pr_9Fe_(52)Co_(13)Zr_1Nb_4B_(21)磁体中通过快速凝固的样品(在983 K下短时间退火)产生的晶粒之间的微观结构和相互作用。样品以直径1mm的吸铸棒,1mm的厚板和3mm的外径(od)管的形式生产.X射线衍射分析和Mossbauer光谱显示存在硬磁Pr_2Fe_(11.2)Co_( 2.8)B和顺磁性Pr_(1 + x)Fe_4B_4晶相在所有样品中均稀释在非晶质基质中。使用TEM显微镜研究了微观结构。此外,研究了随着外部磁场H的变化而发生的不可逆磁化强度的变化。为了表征晶相晶粒之间的相互作用,还根据反冲数据构造了δM曲线。

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