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针对总厚度为 4mm的LF6合金双层靶和总厚度为 2mm的三层靶进行了直径为 2mm ,速度分别为5 .8和 7.2km/s的GCr15粒子撞击试验 ,并对双层靶进行了不同前靶厚度和靶间距的撞击试验 .试验结果表明 :与同样碰撞条件下半无限体靶上产生的破坏情况相比 ,多层靶被击穿的总厚度远小于半无限体靶上形成的弹坑深度 .采用多层靶结构可显著提高材料的抗高速粒子撞击能力 ,并大大降低航天器抗高速粒子撞击的防护结构的重量 .结构的层数越多 ,防护性能越好 .在满足防高速粒子击穿的条件下 ,为减小航天器多层防护结构的体积 ,靶间距一般可取为粒子直径的 2 5倍左右 .
The GCr15 particle impact test with the diameter of 2mm and the velocity of 5.8km and 7.2km / s respectively was carried out on the LF6 alloy double target with a total thickness of 4mm and the three-layer target with a total thickness of 2mm, Different target thickness and target spacing.The experimental results show that the total thickness of multi-layer target breakdown is much smaller than that of the semi-infinite body target under the same collision conditions Crater Depth. The use of multi-layer target structure can significantly improve the high-speed particle impact resistance of materials and greatly reduce the spacecraft anti-high-speed particle impact protection structure of the weight of the structure of the more layers, the better protection performance in meeting anti-high-speed Particle breakdown conditions, in order to reduce the size of the spacecraft multi-layer protective structure, the target pitch is generally desirable particle diameter of about 25 times.