论文部分内容阅读
采用非自耗电弧熔炼炉制备了Er2Fe17-xCrx(x=0、1、2、3、4)合金,借助X射线衍射仪(XRD)、扫描电镜(SEM)和网络矢量分析仪(VNA)研究了Cr的加入量对Er2Fe17合金相结构及微波吸波性能的影响。结果表明,x=0、1、2时,合金主要由单相Er2Fe17组成;继续增加Cr的含量,当x=3、4时,合金由Er2Fe17和Er6Fe23两相组成。当吸波涂层厚度d=2 mm时,Er2Fe17-xCrx(x=0、1、2、3、4)合金的最小吸收峰值在9、13、14.5、15.8和16.8 GHz处分别达到-17.5、-20、-39.2、-17和-15 d B;吸收峰频率随着Cr含量的增加,向高频方向移动。随着吸波涂层厚度的增加,Er2Fe14Cr3试样的吸收峰频率向低频方向移动,吸收峰值先减小后增大,最佳匹配条件出现在d=2 mm处。
Er2Fe17-xCrx (x = 0, 1, 2, 3, 4) alloys were prepared by non-consumable arc melting furnace and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and network vector analyzer (VNA) The effects of Cr addition on the phase structure and microwave absorption performance of Er2Fe17 alloy were investigated. The results show that the alloy mainly consists of single phase Er2Fe17 when x = 0, 1 and 2, and the content of Cr continues to increase. When x = 3 and 4, the alloy consists of two phases, Er2Fe17 and Er6Fe23. The minimum absorption peak of Er2Fe17-xCrx (x = 0,1,2,3,4) alloy reaches -17.5 at 9, 13, 14.5, 15.8 and 16.8 GHz when the thickness of absorbing coating is d = 2 mm, -20, -39.2, -17 and -15 d B, respectively. The absorption peak frequency shifts to high frequency with the increase of Cr content. With the increase of absorbing coating thickness, the absorption peak frequency of Er2Fe14Cr3 sample moves to lower frequency, the absorption peak first decreases and then increases, and the best matching condition appears at d = 2 mm.