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Polybenzimidazole (PBI) film coating for improved hypervelocity impact energy absorption for space applications

机译：聚苯并咪唑（PBI）薄膜涂料可改善空间应用中的超高速冲击能量吸收

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摘要

This paper deals with how the use of Polybenzimidazole (PBI) as a film coating over conventional composite designs could help improve the hypervelocity impact ballistic performance of the system. PBI coated composite samples were studied for resistance to Low Earth Orbit environment conditions like high vacuum, thermal cycling, Atomic Oxygen and Ultraviolet Radiation in a simulation facility. It was observed that the PBI coated composites reduced mass loss and surface erosion compared to the non-coated samples after LEO exposure. Hypervelocity impact experiments were conducted on the PBI coated composites for impact velocities between 2.5 to 3 km/s. The experiments showed that the PBI film coating significantly increased the energy absorption of the composite system. The effect of thickness increase as a result of the film application on energy absorption was also found to be negligible confirming the effectiveness of PBI coating as a hypervelocity shield.
机译：本文探讨了如何将聚苯并咪唑（PBI）用作常规复合材料设计上的薄膜涂料，可以帮助改善系统的超高速冲击弹道性能。在模拟设施中，研究了涂有PBI的复合材料样品对低地球轨道环境条件（如高真空，热循环，原子氧和紫外线辐射）的抵抗力。观察到，与LEO暴露后的未涂层样品相比，PBI涂层复合材料减少了质量损失和表面侵蚀。在PBI涂层的复合材料上进行了超高速冲击试验，冲击速度在2.5至3 km / s之间。实验表明，PBI薄膜涂层显着提高了复合体系的能量吸收。还发现由于施加膜而增加厚度对能量吸收的影响是微不足道的，这证实了PBI涂层作为超高速屏蔽层的有效性。

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