TY - CHAP A1 - Theiler, Geraldine A1 - Gradt, Thomas ED - Kalia, S. ED - Fu, S.-Y. T1 - Friction an wear of polymer materials at cryogenic temperatures N2 - Polymers are extensively used for sliding systems in cryogenic applications because of their favourable friction and wear behaviour in the absence of external lubrication. Since important new technologies are based on applications under extreme conditions, such as at low temperatures, new requirements on material properties, in particular regarding their operability and reliability, must be met. Up to now, most tribological investigations have been carried out in inert cryogens or cryogenic gas (He, N2). Few experiments have been performed in vacuum environment at cryogenic temperatures. Rarely were testing in reactive media, such as LH2 or LOX. Due to the wide range of operating conditions in cryogenic applications, it is difficult to state general rules. Therefore, this chapter tends to give an overview on theories and experimental studies on polymer tribology at cryogenic temperatures. PY - 2013 SN - 978-3-642-35334-5 SN - 978-3-642-35335-2 U6 - https://doi.org/10.1007/978-3-642-35335-2_3 SP - Chapter 3, 41 EP - 58 PB - Springer CY - Berlin Heidelberg AN - OPUS4-31188 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Friedrich, K. A1 - Theiler, Geraldine A1 - Klein, P. ED - Sujeet K. Sinha, ED - Brian J. Briscoe, T1 - Polymer composites for tribological applications in a range between liquid Helium and room temperature KW - Polymer composites KW - Tribology PY - 2009 SN - 978-1-84816-202-0 IS - Chapter 11 SP - 375 EP - 415 PB - Imperial College Press AN - OPUS4-19517 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CHAP A1 - Friedrich, K. A1 - Theiler, Geraldine A1 - Klein, P. ED - Sinha, S. K. T1 - Chapter 9: Polymer composites for tribological applications in a range between liquid helium and room temperature N2 - This chapter deals with the development of polyetheretherketone (PEEK) and polytetrafluoroethylene (PTFE)-based composites, optimized for low friction and low wear performance under extreme environments. It is demonstrated that the incorporation of a harder polymer component into PTFE (such as PEEK particles), a short fiber reinforcement (e.g. carbon fibers (CFs)) and internal lubricants (e.g. PTFE particles) helps to reduce the friction and to improve the wear resistance over a very wide temperature range. KW - Polymer composites KW - Friction KW - Wear KW - Cryogenic temperature PY - 2018 SN - 978-981-3227-78-1 SN - 978-981-3227-80-4 SP - 307 EP - 343 PB - World Scientific Publishing Co. Pte. Ltd. AN - OPUS4-46321 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -