中文摘要：

采用电弧熔炼与高能球磨相结合的方法制备Tb9Fe88Cr3合金粉体,利用XRD、SEM和矢量网络分析仪分析粉体的微结构及微波吸收性能。研究发现进行微氧化处理的合金微粉在低频端吸波性能优于未处理的合金微粉。在微氧化处理基础上,进一步研究热处理温度对合金微波吸收性能影响,研究发现：当热处理温度在350℃时,吸收峰在7GHz处,其峰值达到–11.5dB,随着真空热处理温度升高,合金微粉吸收峰向低频移动,反射率增大;当热处理温度为450和550℃时,吸收峰频率与仅做微氧化处理合金的吸收频率相近,吸收峰值减小了2~3dB,低频端吸波性能得到进一步改善。

英文摘要：

The Tb9Fe88Cr3 alloy powders were prepared by the arc melting method and high energy ball milling. The phase structure and the microstructure of the alloys powders were analyzed by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. Then their microwave absorbing properties were analyzed by a vector network analyzer. The results show that the absorbing properties of the powders with micro-oxidation treatment at low frequency are better than that in raw state. On the basis of micro-oxidation treatment, the powders were dealt with by vacuum heat treatment at different temperatures. When the vacuum heat treatment temperature is 350 °C, the absorption peak value of the powders reaches–11.5 dB at 7 GHz. As the temperature of vacuum heat treatment increases, the absorption peak shifts towards the lower frequency region, and the reflectivity increases. When the vacuum heat treatment temperature is 450 and 550 °C, compared to that of the sample only dealt with by micro-oxidation treatment, they have similar absorption frequency, the absorption peak value decreases by 2~3 dB, and the absorbing properties at low frequency region are improved further.