超高速弹丸撞击三维编织C/SiC复合材料双层板结构的实验研究

 目前在航天器防护结构设计中，采用的方案仍是双层（或多层）屏蔽结构 。双层板屏蔽结构由前板、后板和空隙组成。实验采用一种新型三维四向碳纤维织物结构增强SiC陶瓷基复合材料（简写为3DBC/SiC）做前板，其在超高速弹丸冲击作用下发生粉末化，和铝板做前板相比，所形成的碎片云团中有效碎片数目大大减少，减轻了对后板的破坏作用。结果表明：3DBC/SiC是航天器防护结构设计中一种比较理想的防护材料。

A Study of Hypervelocity Impact on 3DBC/SiC Composite Material Dual-Plate Armor

The dual-plate(or multi-layered) system,first suggested by Whipple in 1940',is a possible means of protecting spacecraft from micrometeoroid impacts.Dual plate armor consists of an outer (bumper) plate,a space,and an inner(catcher) plate.In this work,the bumper plates were SiC ceramic matrix composite reinforced with 3-D braiding fabric (3DBC/SiC) plates,which were comminuted at hypervelocity impacting,resulting in smaller fragments in debris clouds and less damage on catcher plates.Pure aluminum plates and LY12 aluminum plates were also used as bumper plates.But both of them couldn't comminute the projectile and caused severely damage on catcher plates.It is shown that 3DBC/SiC is an ideal material for protecting spacecraft.