TY - JOUR A1 - Golusda, L. A1 - Kühl, A. A. A1 - Lehmann, M. A1 - Dahlke, K. A1 - Mueller, S. A1 - Boehm-Sturm, P. A1 - Saatz, Jessica A1 - Traub, Heike A1 - Schnorr, J. A1 - Freise, C. A1 - Taupitz, M. A1 - Biskup, K. A1 - Blanchard, V. A1 - Klein, O. A1 - Sack, I. A1 - Siegmund, B. A1 - Paclik, D. T1 - Visualization of inflammation in experimental colitis by magnetic resonance imaging using very small superparamagnetic iron oxide particles N2 - Inflammatory bowel diseases (IBD) comprise mainly ulcerative colitis (UC) and Crohn´s disease (CD). Both forms present with a chronic inflammation of the (gastro) intestinal tract, which induces excessive changes in the composition of the associated extracellular matrix (ECM). In UC, the inflammation is limited to the colon, whereas it can occur throughout the entire gastrointestinal tract in CD. Tools for early diagnosis of IBD are still very limited and highly invasive and measures for standardized evaluation of structural changes are scarce. To investigate an efficient non-invasive way of diagnosing intestinal inflammation and early changes of the ECM, very small superparamagnetic iron oxide nanoparticles (VSOPs) in magnetic resonance imaging (MRI) were applied in two mouse models of experimental colitis: the dextran sulfate sodium (DSS)-induced colitis and the transfer model of colitis. For further validation of ECM changes and inflammation, tissue sections were analyzed by immunohistochemistry. For in depth ex-vivo investigation of VSOPs localization within the tissue, Europium-doped VSOPs served to visualize the contrast agent by imaging mass cytometry (IMC). VSOPs accumulation in the inflamed colon wall of DSS-induced colitis mice was visualized in T2* weighted MRI scans. Components of the ECM, especially the hyaluronic acid content, were found to influence VSOPs binding. Using IMC, colocalization of VSOPs with macrophages and endothelial cells in colon tissue was shown. In contrast to the DSS model, colonic inflammation could not be visualized with VSOP-enhanced MRI in transfer colitis. VSOPs present a potential contrast agent for contrast-enhanced MRI to detect intestinal inflammation in mice at an early stage and in a less invasive manner depending on hyaluronic acid content. KW - Inflammation KW - Imaging KW - Immunohistochemistry KW - MRI KW - Nanoparticle KW - Extracellular matrix KW - Laser ablation KW - ICP-MS PY - 2022 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-555395 DO - https://doi.org/10.3389/fphys.2022.862212 SN - 1664-042X VL - 13 IS - July 2022 SP - 1 EP - 15 PB - Frontiers Research Foundation CY - Lausanne AN - OPUS4-55539 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wintzheimer, S. A1 - Szczerba, Wojciech A1 - de Oliveira Guilherme Buzanich, Ana A1 - Kashiwaya, S. A1 - Klein, A. A1 - Jaegermann, W. A1 - Toupance, T. A1 - Shmeliov, A. A1 - Nicolosi, V. A1 - Heuzé, K. A1 - Mandel, K. A1 - Dembski, S. T1 - Discovering the determining parameters for the photocatalytic activity of TiO2 colloids based on an anomalous dependence on the specific surface area N2 - The photocatalytic (PC) performance of titanium dioxide (TiO2) nanoparticles strongly depends on their specific surface, the presence of crystal defects, their crystal phase, and the exposed crystal facets. In order to understand which of these factors contributes most significantly to the PC activity of TiO2 colloids, all of them have to be individually analyzed. This study entails the synthesis of five anatase nanocrystal samples. By maintaining the same reactant ratios as well as hydrothermal sol–gel synthesis route and only varying the autoclaving time or temperature, different crystallite sizes are obtained under comparable experimental conditions. A decrease in PC performance with increase in specific surface area is found. Such an unexpected counterintuitive result establishes the basis for a better understanding of the crucial factors that ultimately determine the PC activity. These are investigated by studying nanocrystals bulk and surface structure and morphology using a selection of complementary analysis methods (X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS), X-ray diffraction (XRD)…). It is found that a change in the nanocrystal morphology from an equilibrium state truncated tetragonal bipyramid to a more elongated rod-like structure accompanied by an increase in oxygen vacancies is responsible for an augmented PC activity of the TiO2 nanocrystals. KW - Ti-based colloids KW - Photocatalysis KW - Spectroscopy KW - XAFS PY - 2018 DO - https://doi.org/10.1002/ppsc.201800216 SN - 0934-0866 SN - 1521-4117 VL - 35 IS - 9 SP - 1800216, 1 EP - 10 PB - Wiley Online Library AN - OPUS4-46068 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Theiler, Geraldine A1 - Hübner, Wolfgang A1 - Gradt, Thomas A1 - Klein, P. A1 - Friedrich, K. T1 - Friction and wear of PTFE composites at cryogenic temperatures N2 - This paper presents investigations on the tribological behaviour of PTFE composites against steel at cryogenic temperatures. The results showed that the friction coefficient decreases with temperature down to 77 K, but did not follow a linear evolution further down to extreme low temperatures. It can be stated that the cryogenic environment has a significant influence on the tribological performance of the polymer composites. The effect of low temperatures was more clearly detected at low sliding speed, where friction heat is reduced. A change in wear mechanism from adhesive to abrasive was observed in this case. SEM and AFM analyses showed that the PTFE matrix composites investigated under these experimental conditions have transferred material onto the disc down to very low temperatures. Chemical analyses indicate the presence of iron fluorides. KW - PTFE composites KW - Cryogenic tribology KW - Transfer film PY - 2002 DO - https://doi.org/10.1016/S0301-679X(02)00035-X SN - 0301-679X VL - 35 IS - 7 SP - 449 EP - 458 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-1866 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klein, P. A1 - Zhang, Z. A1 - Friedrich, K. A1 - Theiler, Geraldine A1 - Hübner, Wolfgang T1 - Zur Bildung von Transferfilmen bei ausgewählten PTFE-Compounds T2 - Tribologie-Fachtagung 2002 CY - Göttingen, Deutschland DA - 2002-09-23 PY - 2002 SN - 3-00-003404-8 VL - 1 SP - 8-1-8-11 PB - GfT CY - Moers AN - OPUS4-1867 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ressel, P. A1 - Österle, Werner A1 - Urban, Ingrid A1 - Dörfel, Ilona A1 - Klein, A. A1 - Vogel, K. A1 - Kräutle, H. T1 - Transmission electron microscopy study of rapid thermally annealed Pd/Ge contacts on IN0.53Ga0.47As PY - 1996 SN - 0021-8979 SN - 1089-7550 VL - 88 SP - 3910 EP - 3914 PB - American Institute of Physics CY - Melville, NY AN - OPUS4-2514 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Theiler, Geraldine A1 - Hübner, Wolfgang A1 - Klein, P. A1 - Friedrich, K. T1 - Tribologisches Verhalten der Werkstoffpaarung Polymerverbundwerkstoff/Stahl bei tiefen Temperaturen T2 - 44. Tribologie-Fachtagung CY - Göttingen, Deutschland DA - 2003-09-22 PY - 2003 SN - 3-00-003404-8 VL - 1 SP - 8-1-8-12 PB - GfT CY - Moers AN - OPUS4-2664 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Klein, P. A1 - Friedrich, K. A1 - Theiler, Geraldine A1 - Hübner, Wolfgang T1 - Mechanische und tribologische Eigenschaften von PTFE/PEEK/CF-Verbundwerkstoffen T2 - BAM-Sonderheft 2003 "Polymere Verbundwerkstoffe zwischen Raumtemperatur und 4,2 K" ; 2. Symposium im DFG-Projekt: Eigenschaften von PTFE- und PEEK-Matrix-Werkstoffen bei tribologischer Beanspruchung CY - Berlin, Deutschland DA - 2003-02-27 PY - 2003 SP - 11 EP - 17 AN - OPUS4-2669 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Theiler, Geraldine A1 - Hübner, Wolfgang A1 - Klein, P. A1 - Friedrich, K. T1 - Oberflächencharakterisierung von Paarungen PTFE-Komposit/Stahl nach tribologischer Beanspruchung in LN2, LH2 und LHe - Rolle der Kältemittel T2 - BAM-Sonderheft 2003 "Polymere Verbundwerkstoffe zwischen Raumtemperatur und 4,2 K" ; 2. Symposium im DFG-Projekt: Eigenschaften von PTFE- und PEEK-Matrix-Werkstoffen bei tribologischer Beanspruchung CY - Berlin, Deutschland DA - 2003-02-27 PY - 2003 SP - 17 EP - 23 AN - OPUS4-2670 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klein, K. T1 - Das Galvanisieren von nichtrostenden Stählen PY - 1958 SN - 0075-2819 VL - 14 SP - 275 EP - 280 PB - Leuze CY - Bad Saulgau AN - OPUS4-7741 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klein, K. T1 - Aus der galvanischen Praxis PY - 1959 SN - 0075-2819 VL - 15 SP - 242 EP - 248 PB - Leuze CY - Bad Saulgau AN - OPUS4-10009 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Theiler, Géraldine A1 - Hübner, Wolfgang A1 - Gradt, Thomas A1 - Klein, P. A1 - Friedrich, K. T1 - Tribologisches Verhalten der Werkstoffpaarung Polymerverbundwerkstoff/Stahl bei tiefen Temperaturen KW - Kryotechnik KW - Polymerkomposite KW - PTFE KW - PEEK KW - Flüssigwasserstoff KW - Flüssighelium KW - Reibungszahlen KW - Übertrag PY - 2005 SN - 0724-3472 VL - 52 IS - 1 SP - 20 EP - 25 PB - Expert Verlag CY - Renningen AN - OPUS4-12645 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Theiler, Geraldine A1 - Hübner, Wolfgang A1 - Klein, P. A1 - Friedrich, K. ED - Bageur, G. G. ED - Seyfert, P. T1 - Influence of low temperatures and environmental media on the frictional characteristics of PTFE composites T2 - ICEC 19 - 19th International Cryogenic Engineering Conference CY - Grenoble, France DA - 2002-07-22 PY - 2002 SN - 81-7319508-0 SP - 717 EP - 720 PB - Narosa Publ. House CY - New Delhi AN - OPUS4-12661 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Theiler, Geraldine A1 - Meine, Kerstin A1 - Hübner, Wolfgang A1 - Klein, P. A1 - Friedrich, K. ED - Bageur, G. G. ED - Seyfert, P. T1 - Thermal shock cycle experiments between room and cryogenic temperatures on polymer composites T2 - ICEC 19 - 19th International Cryogenic Engineering Conference CY - Grenoble, France DA - 2002-07-22 PY - 2002 SN - 81-7319508-0 SP - 729 EP - 732 PB - Narosa Publ. House CY - New Delhi AN - OPUS4-12662 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klein, P. A1 - Zhang, Z. A1 - Friedrich, K. A1 - Theiler, Géraldine A1 - Hübner, Wolfgang T1 - Zur Bildung von Transferfilmen bei ausgewählten PTFE-Compounds KW - Wear KW - Transfer film KW - Polytetrafluoroethylene KW - Composites PY - 2003 SN - 0724-3472 VL - 50 IS - 4 SP - 32 EP - 36 PB - Expert Verlag CY - Renningen AN - OPUS4-12663 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hübner, Wolfgang A1 - Theiler, Geraldine A1 - Klein, P. A1 - Friedrich, K. T1 - Untersuchungen zum Einfluss kryogener Medien auf den Materialtransfer im Tribosystem Polymer-Komposit/Stahl T2 - Tribologie-Fachtagung 2000 CY - Göttingen, Deutschland DA - 2000-09-25 PY - 2000 SN - 3-00-003404-8 VL - 1 SP - 12-1 - 12-11 PB - Gesellschaft für Tribologie CY - Moers AN - OPUS4-12654 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Klein, P. A1 - Friedrich, K. A1 - Theiler, Geraldine A1 - Hübner, Wolfgang T1 - Tribologische Untersuchungen an PTFE-Verbundwerkstoffen für den Einsatz in kryogenen Medien T2 - Tribologie-Fachtagung 2000 CY - Göttingen, Deutschland DA - 2000-09-25 PY - 2000 SN - 3-00-003404-8 VL - 1 SP - 9-1 - 9-10 PB - Gesellschaft für Tribologie CY - Moers AN - OPUS4-12655 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Theiler, Geraldine A1 - Hübner, Wolfgang A1 - Klein, P. A1 - Friedrich, K. ED - Friedrich, K. ED - Hübner, W. T1 - Tribologische Eigenschaften ausgewählter PTFE-Werkstoffe bei tiefen Temperaturen T2 - 1. Symposium im DFG-Projekt 'Eigenschaften von PTFE- und PEEK-Matrix-Werkstoffen bei Tribologischer Beanspruchung' CY - Berlin, Germany DA - 2000-11-24 PY - 2001 N1 - Serientitel: BAM-Sonderheft – Series title: BAM-Sonderheft IS - 3 SP - 19 EP - 26 PB - BAM CY - Berlin AN - OPUS4-12656 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Klein, P. A1 - Friedrich, K. A1 - Theiler, Geraldine A1 - Hübner, Wolfgang ED - Friedrich, K. ED - Hübner, W. T1 - Untersuchungen zum Verschleissverhalten ausgewählter PTPE-Werkstoffe bei Raumtemperatur T2 - 1. Symposium im DFG-Projekt 'Eigenschaften von PTFE- und PEEK-Matrix-Werkstoffen bei Tribologischer Beanspruchung' CY - Berlin, Germany DA - 2000-11-24 PY - 2001 N1 - Serientitel: BAM-Sonderheft – Series title: BAM-Sonderheft VL - 2001-3 IS - 3 SP - 13 EP - 18 PB - BAM CY - Berlin AN - OPUS4-12657 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hübner, Wolfgang A1 - Theiler, Geraldine A1 - Gradt, Thomas A1 - Klein, P. A1 - Friedrich, K. T1 - Der Einfluss kryogener Medien auf den Materialtransfer im Tribosystem Polymerkomposit/Stahl PY - 2001 SN - 0724-3472 VL - 48 IS - 6 SP - 8 EP - 12 PB - Expert Verlag CY - Renningen AN - OPUS4-12659 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Hübner, Wolfgang A1 - Theiler, Geraldine A1 - Klein, P. A1 - Friedrich, K. T1 - Tribological behaviour of PTFE composites against steel at cryogenic temperatures T2 - 2nd World Tribology Congress ; 2nd WTC 2001 CY - Vienna, Austria DA - 2001-09-03 KW - PTFE composite KW - Cryogenic temperature KW - Transfer film KW - SEM KW - XPS PY - 2001 SN - 3-901657-09-6 SP - 1(?) EP - 4(?) PB - ÖTG CY - Vienna AN - OPUS4-12660 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Friedrich, K. A1 - Klein, P. A1 - Theiler, Geraldine A1 - Ye, L. A1 - Mai, Y.W. T1 - PEEK- and PTFE- Based Composites for Tribology Applications in a Range between Liquid Helium and Room Temperature N2 - This study deals with the development of PEEK (polyehteretherketone) and PTFE (polytetrafluoroethylene) 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 CF), 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 - Composites KW - Tribology KW - PEEK KW - PTFE KW - Temperature KW - Friction KW - Wear PY - 2007 SN - 1013-9826 VL - 334-335 SP - 597 EP - 600 PB - Trans Tech Publ. CY - Aedermannsdorf AN - OPUS4-15045 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 - GEN A1 - Klein, P. A1 - Theiler, Geraldine A1 - Friedrich, K. T1 - Tribological behavior of short Carbon fiber reinforced PTFE- and PEEK-compounds T2 - 15th International Sealing Conference CY - Stuttgart, Germany DA - 2008-10-07 KW - Polymer composite KW - Tribology KW - Low temperatures PY - 2008 SN - 978-3-00-025884-8 IS - A 22 SP - 292 EP - 301 PB - Leithner Media Production CY - Ebelsbach AN - OPUS4-19518 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bannick, Claus Gerhard A1 - Bierl, R. A1 - Braun, Ulrike A1 - Brand, K. A1 - Dümichen, Erik A1 - Jekel, M. A1 - Klein, S. A1 - Knepper, T.P. A1 - König, F. A1 - Miklos, D. A1 - Rechenberg, B. A1 - Steffens, I. T1 - Mikroplastik in der aquatischen Umwelt - Ein Beitrag zur aktuellen Diskussion in Deutschland N2 - Plastics are important materials in households and industry and therefore a crucial part of our everyday life. Since the beginning of the 1970s the occurrence of plastic particles in coastal waters has been explicitly described. Meanwhile, besides the marine environment, microplastics were also detected in other environmental media, biota and water management facilities. This work gives an overview of the occurrence and first known effects of microplastics in the environment. Furthermore, current scientific proceedings are considered and pending issues are discussed. In this regard it is of central importance to develop an environmentally comprehensive, harmonized scientific proceeding for miroplastics, which enables an evaluation of relevant material flows in adaption to necessary assessment concepts. N2 - Kunststoffe sind wichtige Werkstoffe und heutzutage aus Haushalt und Wirtschaft nicht mehr wegzudenken. Seit Anfang der 1970er-Jahre wird das Vorkommen von Kunststoffpartikeln in Küstengewässern beschrieben. Inzwischen ist Mikroplastik nicht nur im marinen Bereich, sondern auch in weiteren Umweltkompartimenten, Biota und technischen Einrichtungen der Wasserwirtschaft nachgewiesen worden, in dieser Arbeit wird ein Überblick über das Vorkommen von Mikroplastik in der aquatischen Umwelt und ersten bekannten Auswirkungen gegeben. Darüber hinaus werden die aktuellen Untersuchungsverfahren von Probenahme, Probenaufbereitung und Analytik betrachtet und offene fragen diskutiert. Zentral erscheint in diesem Zusammenhang die Entwicklung einer harmonisierten medienübergreifenden Untersuchungsmethodik, die eine Auswertung relevanter Stoffströme ermöglicht und auf notwendige Bewertungskonzepte abgestimmt ist. KW - Water management KW - Plastics KW - Microplastics KW - Environment KW - Analysis KW - Mikroplastik KW - Kunststoff KW - Wasserwirtschaft KW - Analytik KW - Umwelt PY - 2015 SN - 0083-6915 VL - 113 IS - 1 SP - 7 EP - 14 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-33105 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Enderlein, M. A1 - Kuna, M. A1 - Ricoeur, A. A1 - Baer, Wolfram A1 - Müller, Karsten A1 - Klein, K. A1 - Winkler, H. P. T1 - Numerische Analyse des Stoßbiegeversuchs zur Ermittlung der dynamischen Bruchzähigkeit KW - Bruchmechanik KW - Finite-Elemente-Methode KW - Dynamisches J-Integral KW - 3-Punkt-Biege-Großprobe PY - 2003 SN - 0943-3473 SN - 1616-4687 IS - 235 SP - 251 EP - 260 PB - DVM CY - Berlin AN - OPUS4-32709 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ressel, P. A1 - Österle, Werner A1 - Urban, Ingrid A1 - Klein, A. A1 - Vogel, K. A1 - Kräutle, H. T1 - Transmission electron microscopy study of rapid thermally annealed Pd/Ge contacts on In0.53Ga0.47As N2 - Phase formation in rapid thermally annealed Pd/Ge contacts on In0.53Ga0.47As has been investigated by means of cross-sectional transmission electron microscopy, convergent-beam electron diffraction, and energy-dispersive x-ray analysis. Solid-phase regrowth is observed to occur similarly as in Pd/Ge contacts on GaAs or InP. The reaction starts at low temperatures with the formation of an amorphous Pd–In–Ga–As layer, which crystallizes at elevated temperatures yielding hexagonal Pd4In0.53Ga0.47As being first described in this work. At temperatures .250 °C, this phase decomposes due to epitaxial solid-phase regrowth of In0.53Ga0.47As and formation of Pd–Ge phases. The stable composition is reached at temperatures .350 °C with excess Ge diffused through top Pd–Ge to the contact interface and growing epitaxially on the semiconductor. KW - Semiconductor KW - Thin film contact layer KW - Electron microscopy KW - Intermetallic phases PY - 1996 DO - https://doi.org/10.1063/1.363348 SN - 0021-8979 VL - 80 IS - 7 SP - 3910 EP - 3914 AN - OPUS4-38537 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 -