中文摘要：

采用XRD、SEM和矢量网络分析仪分析相结合的方法研究球磨时间对Y-Fe-Cr合金微粉吸波性能的影响。结果表明：随着球磨时间从50 h不断增加,Y9Fe88Cr3吸波合金的吸收峰逐渐向低频移动;当球磨时间低于70 h时,合金扁平化及各向异性较好,其反射率较低,合金粉末吸波性能较好,在吸波涂层厚度为d=1.8 mm条件下,球磨时间为50 h和70 h的合金粉末的电磁波吸收峰峰值分别达到-14.7 dB和-14.4 dB,〈-10 dB的吸波带宽均达到7 GHz;当球磨时间达到80 h后,由于合金粉末颗粒碎化变细导致各向异性变差,其吸波性能变差,在吸波涂层厚度为d=1.8 mm条件下,合金粉末电磁波吸收峰峰值和〈-10 dB的吸波带宽分别为-12.5 dB和3.5 GHz,较球磨时间为70 h之前的合金粉末的吸波峰值和带宽减小了2 dB和3.5 GHz。研究结果为制备同类吸波合金微粉提供一定的理论依据。

英文摘要：

The paper researched the effect of ball-milling time on the absorbing properties of Y-Fe-Cr alloy powder by using XRD,SEM and vector network analyzer.The results showed that as the ball-milling time increased from 50h,the absorption peak of Y9Fe88Cr3 alloy shifted towards lower frequency.When the ball-milling time was less than 70h,the alloy indicated better flat grade and aeolotropism,which had lower reflectivity.As the absorption coating thickness d = 1.8mm,the absorption peak of the alloy powder milled by 50h and 70h respectively reached to-14.7 dB and-14.4 dB,and the absorption bandwidth which less than10dB have achieved to 7 GHz.Because the thinning of alloy powder particles leads to worse aeolotropism,when the milling time reached to 80 h,the microwave absorbing properties would be deteriorated.In the condition of absorption coating thickness d=1.8 mm,the electromagnetic wave absorption peak of the alloy powder and the absorption bandwidth which less than-10 dB are respectively-12.5 dB and 3.5 GHz.Compared to the previous alloy powder milled by 70 h,the absorption peak reduced about 2 dB,and the bandwidth reduced 3.5 GHz.The research provided available theoretical basis for the preparation of similar type of absorbing alloy powder.