某航天硅基复合材料防静电性能测试研究

Study on Silicon-based Composite Electrostatic Resistant Property

高速运动的航空器在其飞行过程中会经历复杂的空间环境,使其静电安全性遭受严峻挑战;针对某型航空隔热瓦硅基复合材料讨论分析了多种防静电性能的评估方法,确定了静电衰减时间作为其防静电性能指标,并采用充电法对静电衰减时间进行了测试研究,获得了该材料在烧蚀前后的静电衰减特性,为评价高速飞行器的静电安全性提供了重要依据;研究结果表明,烧蚀前的硅基复合材料静电衰减时间长,残余电量大;烧蚀后的硅基复合材料静电衰减时间大大减小、残余电量显著降低,防静电性能远好于烧蚀前的硅基复合材料。

The aircraft at high--speed movement in its flight process will undergo complex space environment, and suffered a serious challenge on electrostatic resistant property. Aiming at some silicon--based composites, we analyzed the assessment methods of electrostatic resistant property to determine static decay time as the key assessment parameter, and researched the static decay time of the silicon-- based composites, obtained the fading characteristic before and after ablation, which will provides an important basis for the static security of high --speed aircraft. The results shows that; Silicon--based composites before ablation has a long static decay time and a large residual charge; the static decay time and the residual charge of silicon--based composites after ablation are significantly reduced, which greatly benefit the e- lectrostatic resistant property.