| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7915476 | Cryogenics | 2018 | 6 Pages |
Abstract
The tribological behaviour of polymer composites were investigated in liquid hydrogen at â253â¯Â°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.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Géraldine Theiler, Thomas Gradt,