Effect of Fe Content on the Microwave Performance of HoNi₂ Alloys

Flaky Fe_xHoNi_2−x alloy powders were prepared by vacuum arc-melting and high-energy ball milling. The influences of different Fe substitutions on the surface morphology and microwave absorption properties of the alloy, the influence of alloy thickness on the microwave wave absorbing property, and the effects of magnetic loss and electrical loss on the absorbing properties were studied. The results showed that doping Fe in HoNi₂ alloy powders enhanced the electrical and magnetic loss properties and optimized the microwave absorption properties. When the alloy matching thickness was 2.0 mm, the absorption peak moved to a lower frequency with an increase in Fe content and the maximum reflection loss was − 21.2 dB. From the investigation, when the Fe content was 0.4 and thickness was 2.1 mm, the microwave absorption performance reached the minimum value of − 22.6 dB at 7.2 GHz, which allowed a good microwave absorption performance in the C band.