ABSTRACT

Adjusting fibers shape can further optimize absorbing properties of the FeSiAl_p/PP fibers composites. 80 wt% FeSiAl_p/PP rhombic cross-sectional fibers were successfully prepared by liquid phase blending and extrusion drawing. The strength of the fibers is about 6 ~ 8 MPa. The effective absorption bandwidth (EAB, RL < −10 dB) of the resin matrix composites modified by rhombic cross-sectional fibers is 3.9 GHz and the optimal RL reaches −18.43 dB at 4.5 GHz. Compared with the resin matrix composites modified by circular cross-sectional fibers, the EAB increases by 1.8 GHz and there is a second absorption peak, which has better broadband absorption characteristics.

摘要

调节纤维形状可以进一步优化FeSiAl _p / PP纤维复合材料的吸收性能。通过液相共混和挤出拉伸成功制备了80 wt％的FeSiAl _p / PP菱形截面纤维。纤维的强度约为6〜8MPa。菱形截面纤维改性的树脂基复合材料的有效吸收带宽（EAB，RL <-10 dB）为3.9 GHz，最佳RL在4.5 GHz时达到-18.43 dB。与圆形截面纤维改性的树脂基复合材料相比，EAB增加了1.8 GHz，并出现了第二个吸收峰，具有更好的宽带吸收特性。