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Friction and wear behaviour of polymers in liquid hydrogen

机译：液态氢气聚合物的摩擦磨损行为

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摘要

The tribological behaviour of polymer composites were investigated in liquid hydrogen at -253 degrees C and compared with previous results obtained in gaseous hydrogen at ambient temperature. Experiments reveal that the friction and wear mechanisms in cryogenic conditions are related to the low temperature properties of polymers and to the formation or inhibition of the transfer film. For chemically stable polymers such as PEEK, that does not transfer in hydrogen gas, the tribological behaviour is improved in cryogenic liquids compared to ambient temperature. For tribo-reactive materials and graphite filled polymers that form a homogenous lubricating film in gaseous hydrogen, the sliding performance declines under cryogenic condition. The influence of hydrogen temperatures is discussed in this paper in relation to material compositions and transfer film formation.
机译：在-253℃下研究了聚合物复合材料的摩擦学行为，并与在环境温度下在气态氢中获得的先前结果进行比较。 实验表明，低温条件下的摩擦和磨损机制与聚合物的低温性质和转移膜的形成或抑制有关。 对于诸如PEEK的化学稳定的聚合物，与氢气中不转移，与环境温度相比，低温液体的摩擦学行为得到改善。 对于在气态氢气中形成均匀润滑膜的摩擦反应材料和石墨填充聚合物，在低温条件下滑动性能下降。 本文讨论了氢气温度的影响与材料组合物和转移膜形成。

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