固体潤滑剤スパッタコーテイング膜に及ぼす軌道曝露の影響

概要

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Change in such properties were shown as friction, surface roughness, structure and so on of lubricative coating films of TiN, Cu, Cu/BN that have been effected by exposure to orbit environment for a year, two years and three years with a Russian Service Module/Space Environment Exposure Device (SM/SEED) prepared by JAXA on the International Space Station (ISS). It was found that substrates with the exposure to orbit for a year generally decrease friction coefficient and can keep almost constant even after bakeout under a high vacuum as well as in an atmospheric pressure due to some kind of modification of lubricant layer by the exposure. Surface analysis with XPS showed the formation of Si based contamination and carbon layer and this might have an influence on the change in friction behavior.
2008-08-20