Abstract
The DyxPr1−xNi4Fe (x=0.0, 0.1, 0.2, 0.3, 0.4) alloys were synthesized by arc-smelting and high energy ball milling method. The structure, morphology, particle size and electromagnetic parameters of the powder were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser diffraction-based particle size analyzer and vector network analyzer (VNA), respectively. The results reveal that the DyxPr1−xNi4Fe compounds are crystallized in PrNi4Fe structure. The minimum absorption peak frequency of DyxPr1−xNi4Fe shifts towards higher frequency region upon the Fe content. The minimum reflection loss of the DyxPr1−xNi4Fe alloys increases first and then decreases with increasing Dy substitution. The Dy0.3Pr0.7Ni4Fe alloy possess the best absorbing properties: the minimum reflection loss is −31.65dB at 15.28GHz with the best matching thickness d =1.0mm and the reflection loss with the thickness ranging of 1.0–4.0mm could reach −10dB.
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