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采用电弧熔炼及高能球磨工艺制备出Dy_xPr_(2-x)Fe_(17)(x=0.0,0.1,0.2,0.3,0.4)合金微粉,借助X射线衍射(XRD)、扫描电镜(SEM)、振动样品磁强计(VSM)和网络矢量分析仪等仪器分别对合金微粉的结构、形貌、磁性能及其微波吸收性能进行了研究。结果表明,随着Dy含量的增加,Dy_xPr_(2-x)Fe_(17)微粉的饱和磁化强度降低。Dy_xPr_(2-x)Fe_(17)合金的最小反射峰频率随Dy含量的增加往高频方向移动,最小反射损耗呈先增大后减小的变化趋势;其中Dy_(0.3)Pr_(1.7)Fe_(17)合金具有最好的吸波效果,在最佳匹配厚度2.5 mm下,Dy_(0.3)Pr_(1.7)Fe_(17)合金的最小反射损耗在5.04 GHz处达到-42.38 dB左右,反射损耗小于-10 dB的频带宽度达到了1.20 GHz。
The powder of Dy_xPr_ (2-x) Fe_ (17) (x = 0.0,0.1,0.2,0.3,0.4) alloy was prepared by arc melting and high energy ball milling. The microstructure of the alloy was characterized by XRD, SEM, The structure, morphology, magnetic properties and microwave absorption properties of the alloy powders were studied by using sample magnetometer (VSM) and network vector analyzer. The results show that the saturation magnetization of DyxPr_ (2-x) Fe_ (17) powders decreases with the increase of Dy content. The minimum reflection peak frequency of Dy_xPr_ (2-x) Fe_ (17) alloy moves toward the high frequency with the increase of Dy content, and the minimum reflection loss firstly increases and then decreases. Dy_ (0.3) Pr_ Fe 17 alloy has the best wave absorption effect. The minimum reflection loss of Dy 0.3 Pr 1.7 Fe 17 alloy reaches -42.38 dB at 5.04 GHz with the best matched thickness of 2.5 mm. The reflection Bandwidth loss of less than -10 dB reached 1.20 GHz.