【摘要】 使用原子氧效应地面模拟设备对硅橡胶材料O型圈进行了原子氧暴露实验 ;用测压法进行了O型圈在原子氧暴露前后的泄漏率比对实验 ,并对实验前后O型圈表面形貌特征作了扫描电镜分析 .实验表明 :原子氧对O型圈表面有很大的剥蚀效应 ;O型圈经过原子氧暴露后 ,质量减少、泄漏率明显增大 ;暴露时间越长 ,表面形貌受到的损坏越严重、质量减少量越多 ,泄漏率也就越大更多还原

【Abstract】 Experiments were conducted with an IFM ground equipment to investigate the effect of atomic oxygen on silicone rubber O rings. By measuring the pressure between two O rings, leakage rates between the two O rings before and after exposure to atomic oxygen were compared. In addition, the surface characteristics of O ring were analyzed by scanning electron microscope. All experiments prove that atomic oxygen erodes the surface of O ring seriously, resulting in a weight loss and a weakened sealing capacity of the O ring. The results show that the surface damage, the weight loss and the leakage rate of an O ring all increase in proportion to its of the time exposed to atomic oxygen.更多还原