雷达吸波涂层海洋大气环境适用性试验研究

Experimental Study on Applicability of Radar Absorbing Coating to Marine Atmospheric Environment

目的分析一种雷达吸波隐身涂层在海洋大气自然环境下性能的变化规律。方法对12个月不同阶段涂层的常规物理性能和电性能进行检测,其中常规物理性能包括宏观形貌、金相形貌、微观性能、附着力、抗冲击强度和红外光谱。结果从宏观形貌看,涂层明度和色差值呈上升趋势,12个月明度增加1.22,色差值增加2.91,颜色向绿色和蓝色发展,失光率先增大、后减小,最大失光率为9个月时的34%。涂层附着力和试验时间呈现非线性关系,6个月时,附着力降低了18%,12个月时增大了24%。涂层在2~18GHz的频率范围内,吸波曲线大体呈“U”形,最低反射率随时间向低频方向偏移。涂层金相形貌、微观性能、抗冲击强度和红外光谱特征总体变化不明显。结论在1a内,自然海洋大气环境对雷达吸波隐身涂层常规物理性能和电性能产生了一定影响,但在试验时间相对较短情况下,海洋大气环境对涂层老化的影响作用尚未充分显示,需要结合更长周期的试验数据进一步分析。

The work aims to analyze the change rule of radar absorbing stealth coating in marine atmospheric environment.The conventional physical properties and electrical properties of the coating at different stages within 12 months were examined,including macroscopic morphology,metallographic morphology,microscopic properties,adhesion,impact strength and infrared spectrum.In terms of macroscopic morphology,the brightness and chromatic aberration of the coating increased.The brightness increased by 1.22 and the chromatic aberration increased by 2.91 within 12 months and the color turned green and blue.The loss of light firstly increased and then decreased,with the maximum value of 34%in the 9thmonth.The adhesion of the coating was nonlinear with the test time,and decreased by 18%in the 6thmonth and increased by 24%in the 12thmonth.The radar wave absorption curve was approximately in the shape of"U"within the frequency of 2-18 GHz,and the lowest reflectivity shifted to the low frequency direction with time.The overall change of metallographic morphology,microscopic properties,impact strength and infrared spectrum characteristics of the coating was not clear.Within 1 a,the natural marine atmospheric environment has a certain effect on the conventional physical and electrical properties of radar absorbing stealth coating.However,under the condition of relatively short test time,the effect of marine atmospheric environment on coating aging has not been fully demonstrated,which needs to be further analyzed in combination with longer-term test data.