暴露在低地球轨道(LEO)上的太阳电池阵,会与大量具有极强氧化性的原子氧发生碰撞,导致太阳电池阵中对氧原子敏感的Ag互连材料受到剥蚀.文章依据原子氧剥蚀Ag材料的机理,选取了约400 km高度轨道上1年时间内原子氧的累积通量作为最高剂量,进行了原子氧剥蚀不同厚度Ag互连材料的地面模拟环境试验.试验表明:Ag在原子氧作用下在宏观上会经历"氧化—剥落"的循环剥蚀过程.根据反应方程简化推导了Ag互连片的剥蚀厚度公式,同时结合试验结果计算出了不同厚度Ag互连材料的厚度损失率.该研究成果可为LEO太阳电池阵原子氧防护设计提供技术支持.%The atomic oxygen with strong oxidizing capacity is the main component of the space particles in the LEO environment. The solar array exposed to this space will be impacted by a large number of oxygenatoms, and the Ag interconnector, as an atomic oxygen-sensitive material on the solar array, will be eroded . Based on the mechanism of the atomic oxygen erosion of Ag material, the ground simulation environment experiment for different thickness Ag interconnectors is carried out, with the atomic oxygen cumulative flux in an around 400km orbit within a year as the high dose. The experimental results show that the atomic oxygen erodes Ag interconnectors in an "oxidizing-peeling" cycle. The formula for the eroded thickness of Ag interconnectors is derived based on the reaction equation of Ag and atomic oxygen, and the thickness loss rate of Ag interconnectors of different thicknesses is calculated combined with the experimental results. They will provide a technical support for the design of atomic oxygen protection for the solar array in the low earth orbit.
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