摘要
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 DyxPr（2-x）Fe（17）（x =0.0, 0.1, 0.2, 0.3, 0.4） powder was prepared by arc-smelting and high energy ball milling. The phase structure, morphology, magnetic properties and electromagnetic parameters of the powder were investigated by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, vibrating sample magnetometer（VSM） and vector network analyzer（VNA）, respectively. The results reveal that the saturation magnetization of the DyxPr（2-x）Fe（17） alloys decreases with the increase of Dy content. The minimum absorption peak frequency shifts towards higher frequency region upon the Dy substitution. And the minimum reflection loss of the DyxPr（2-x）Fe（17） alloys increases firstly and then decreases upon the Dy content. The Dy（0.3）Pr（1.7）Fe（17） powder exhibits the best microwave absorbing properties. The minimum reflection loss of Dy（0.3）Pr（1.7）Fe（17） powder is about –42.38 dB at 5.04 GHz, and the frequency bandwidth of RL –10 d B reaches about 1.20 GHz with the best matching thickness of 2.5 mm.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第8期2060-2064,共5页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(51361007)
Guangxi Natural Science Foundation(2014GXNSFAA118317,2013GXNSFAA019295)
Scientific Research Project of Guangxi Education Department(YB2014139)
Guangxi Key Laboratory of Information Materials(131010-Z)
关键词
Dy-Pr-Fe合金
高能球磨
磁性能
电磁参数
反射损耗
Dy-Pr-Fe alloys
high energy ball milling
magnetic properties
electromagnetic parameters
reflection loss
