Hyperthermal atomic oxygen interaction with MoS2 lubricants and relevance to space environmental effects in low earth orbit – effects on friction coefficient and wear-life
Hyperthermal atomic oxygen interaction with MoS2 lubricants and relevance to space environmental effects in low earth orbit – effects on friction coefficient and wear-life
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DOI：
10.1007/s11249-004-3594-1
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发表时间：
2005-04
影响因子：
3.2
通讯作者：
M. Tagawa;M. Muromoto;S. Hachiue-;K. Yokota;N. Ohmae;K. Matsumoto;M. Suzuki
中科院分区：
文献类型：
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作者：
M. Tagawa;M. Muromoto;S. Hachiue-;K. Yokota;N. Ohmae;K. Matsumoto;M. Suzuki
在模拟近地轨道原子氧环境的5 eV原子氧暴露条件下，对MoS 2薄膜进行了原位摩擦磨损试验。采用激光爆轰原子氧源和传统的销盘摩擦试验机相结合的方式进行摩擦学试验。结果表明，当原子氧注量较低时，摩擦系数不受原子氧辐照的影响，但随着原子氧注量的增加，摩擦系数逐渐增大，当原子氧注量为3.4 × 1016 atoms/cm ~ 2/cycle时，摩擦系数达到0.05（是正常值的9倍）。原子氧对膜层磨损寿命的影响更为显著。当原子氧注量为1.7 × 10 ~（16）atoms/cm ~ 2/cycle时，膜层的磨损寿命降低不到原位试验结果的1/10。还观察到膜的磨损寿命与滑动道次之间的原子氧注量成反比。
Wear-life of the MoS2film was evaluated byin situtribological testing under 5 eV atomic oxygen exposures which simulated atomic oxygen environment in low Earth orbit. A combination of a laser-detonation atomic oxygen source and a conventional pin-on-disk friction tester was used to perform tribological tests. It was confirmed that the friction coefficient was not affected by atomic oxygen exposure when atomic oxygen fluence was low; however, the friction coefficient increased with increasing atomic oxygen fluence and it reached as high as 0.05 at the atomic oxygen fluence of 3.4 × 1016atoms/cm2/cycle (nine times larger than the normal value). Effect of atomic oxygen on the wear-life of the film has much more drastic. With atomic oxygen fluence of 1.7 × 1016atoms/cm2/cycle, wear-life of the film was reduced less than one-tenth of that duringex situtesting result of the same film. It was also observed that the wear-life of the film was inversely proportional to the atomic oxygen fluence between sliding passes.