TY - CONF A1 - Gradt, Thomas T1 - MoS2-Coatings for support elements in the Wendelstein 7-X nuclear fusion experiment N2 - The magnetic plasma confinement system of the nuclear fusion experiment “Wendelstein 7-X”, which recently produced the first plasma, consists of 20 planar and 50 non-planar superconducting coils. To keep them precisely in position, these coils contact each other at special support elements. The supports are operated in high vacuum at a temperature of about 4 K, and when the magnetic field is ramped up, forces up to 1500 kN and sliding motion of some mm occurs. Because mechanical disturbances may cause severe failures, only low friction without any stick-slip behaviour is tolerable. In pre-tests a PVD-MoS2-coating had proven to be the optimum solution. It was tested with downsized samples in reciprocating motion in liquid nitrogen (T = 77 K) and liquid helium (T = 4,2 K). In long-term tests in liquid nitrogen this coating showed stable sliding for up to 14.900 friction cycles without coating failure. However, in liquid helium an unexpected stick-slip effect occurred, whose origin could not be clarified so far. T2 - BAM Kolloquium Abteilung Werkstofftechnik CY - Berlin, Germany DA - 09.06.2016 KW - Kernfusion KW - Magnetischer Einschluss KW - Supraleitende Magnete KW - Tribologie KW - Festschmierstoffe KW - Magnetic confinement KW - Tribology KW - Lubricants KW - Superconducting magnet KW - Nuclear fusion PY - 2016 AN - OPUS4-38140 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Backes, Sebastian A1 - Cappella, Brunero T1 - Force distance curves (FDC) & contact resionance (CR) measurement modes for mechanical property measurements N2 - At the Stakeholder meeting of the EMPIR project “Multifunctional ultrafast microprobes for on-the-machine measurements”, details about two measurement modes were presented. Force distance curves and contact resonance measurements are compared. The basic principles are explained and exemplary measurements concerning mechanical properties of polymers are shown. T2 - 19th International Conference and Exhibition (European Society for Precision Engineering and Nanotechnology/EUSPEN) CY - Bilbao, Spain DA - 03.06.2019 KW - Force distance curve KW - Contact resonance KW - Lubricants KW - Photoresist PY - 2019 AN - OPUS4-49905 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Woydt, Mathias T1 - Scenarios and new technologies for complying with CO2 regulations - the contribution of lubricants - N2 - The present work deals with lubricants for mobility. T2 - Automechanika: Symposium "The Vital Lubricants" CY - Frankfurt/Main, Germany DA - 12.09.2018 KW - Lubricants KW - New technologies KW - Fuel economy KW - Mobility PY - 2018 AN - OPUS4-46215 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -