TY - THES A1 - König, Franziska T1 - Investigation of High Reynolds Number Pipe Flow Y1 - 2015 SN - 978-3-73699-049-4 PB - Cuvillier CY - Göttingen ER - TY - CHAP A1 - Öngüner, Emir A1 - Zanoun, El-Sayed A1 - König, Franziska A1 - Egbers, Christoph T1 - Structure Investigation in Pipe Flow at High Reynolds Numbers Y1 - 2016 SN - 978-3-319-29130-7 SP - 217 EP - 220 PB - Springer CY - Berlin ER - TY - CHAP A1 - Öngüner, Emir A1 - König, Franziska A1 - Zanoun, El-Sayed A1 - Egbers, Christoph T1 - Experimentelle Untersuchung der turbulenten Rohrstrukturen bei hohen Reynolds Zahlen T2 - GALA - Fachtagung Lasermethoden in der Strömungsmesstechnik, 22. Fachtagung, 9. - 11. September 2014, Karlsruhe Y1 - 2014 SN - 978-3-9816764-0-2 SP - S. 24 PB - GALA CY - Karlsruhe ER - TY - CHAP A1 - Zanoun, El-Sayed A1 - König, Franziska A1 - Al-Mutairi, Fahad M. A1 - Egbers, Christoph A1 - Öngüner, Emir T1 - On the Application of Hot Wires and Pitot Tubes in Pipe and Channel Flows T2 - HEFAT 2014, 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, 6 – 9 July 2014 Orlando, Florida Y1 - 2014 U6 - https://doi.org/10.13140/2.1.3766.7521 ER - TY - GEN A1 - Schulze, Marcus A1 - Seidlitz, Holger A1 - König, Franziska A1 - Weiß, Sabine T1 - Nanoindentation measurements of PVD coated multilayer constructions T2 - Journal of Achievements in Materials and Manufacturing Engineering N2 - Carbon fibre reinforced thermoplastics (CFRP) are intensively used in lightweight applications due to their high strength to weight ratio. In addition they offer good crash, damping and recycling properties. On the basis of their morphology they are suitable for large scale manufacturing processes. A major disadvantage consists of its poor hardness properties, which is again an important requirement to realize a good erosion and wear behaviour. Design/methodology/approach: In this work the application of orthotropic carbon fibre reinforced polymers (PA6), with protective TiAlN coatings, produced by physical vapor deposition (PVD), is investigated. The characterization of the coating is performed by nanoindentation tests, roughness measurements and scanning electron microscopy. Furthermore micro hardness tests on selected well prepared cross sections are conducted, to compare the coating quality with established coating systems. Findings: By applying TiAlN coating, the hardness of the CFRP samples can be increased substantially up to 15 GPa, in comparison to the basic substrate. In addition the quality of the coating surface can be improved significantly by plasma etching pre-treatment. Research limitations/implications: The presented findings are preliminary results to prove the application of a standard processed ceramic coating on new composite types for mass production. The PVD coating process as well as the utilized testing methods are suitable to realize hard coatings on thermoplastic CFRP. This effect can be exploited for several lightweight applications to increase the erosion and wear resistance of composite materials. Originality/value: The presented results show, that ceramic coatings can be deposited on standard thermoplastic CFRP with polyamide 6 matrix. Therewith it can be expected, that the PVD coating process can make a essential contribution to increase the range of applications. KW - Nanoindentation KW - Thermoplastic composites KW - TiAlN-coating Y1 - 2015 UR - http://www.journalamme.org/vol72_2/7221.pdf SN - 1734-8412 VL - 72 IS - 2 SP - 53 EP - 60 ER - TY - GEN A1 - König, Franziska A1 - Zanoun, El-Sayed A1 - Öngüner, Emir A1 - Egbers, Christoph T1 - The CoLaPipe - The new Cottbus large pipe test facility at Brandenburg University of Technology Cottbus-Senftenberg T2 - Review of scientific instruments Y1 - 2014 U6 - https://doi.org/10.1063/1.4884717 SN - 1089-7623 VL - 85 IS - 7 SP - 075115-1 EP - 075115-9 ER - TY - GEN A1 - König, Franziska A1 - Zanoun, El-Sayed A1 - Jehring, Lothar A1 - Egbers, Christoph T1 - On the behavior of the inner peak in turbulent pipe flow Y1 - 2013 UR - http://etc14.ens-lyon.fr/openconf/modules/request.php?module=oc_proceedings&action=view.php&a=Poster&id=574 N1 - 14th European Turbulence Conference, 1– 4 September 2013, Lyon, France ER - TY - GEN A1 - Schulze, Marcus A1 - Seidlitz, Holger A1 - König, Franziska A1 - Weiß, Sabine T1 - Tribological Investigations of PVD Coated Multi-Layer Constructions T2 - Journal of Materials Science Research N2 - Multi-layer constructions become more and more relevant in lightweight applications due to their high strength to weight ratio. They offer excellent crash, damping and recycling properties. Also, the morphology of thermoplastic carbon fibre reinforced plastics (CFRP) render them interesting for large scale manufacturing processes. Nevertheless, a major disadvantage results in a poor resistance against wear and tear, e.g. erosion, which is attributed to weak hardness properties. Hence, this work deals with tribological investigations on orthotropic carbon fibre reinforced polymers (PA 6) either with protective ceramic coating or without. The chosen coating system is a well-known protective covering of metal components, e.g. metal cutting tools, produced by physical vapor deposition (PVD). To characterize the coating system on thermoplastic CFRP, standard analyzing methods are utilized, like optical and scanning electron microscopy (SEM). The tribological investigations are conducted by the tribological ball on disk method to generate wear tracks on the sample surfaces and hence to calculate the wear rates. These results are compared to literature findings with respect to a certain protective coating system (TiN) and a second nano-structured gel coating system, where both systems are deposited on a thermosetting material, i.e. carbon fibre reinforced epoxy resin, respectively. For this purpose the feasibility of depositing a protective ceramic layer on thermoplastic CFRP is demonstrated. First results on suitable surface pre-treatments have shown a significant influence on the coating quality. The improved performance regarding the wear behavior with respect to tribology compared to the poor substrate and existing technologies is shown additionally. KW - thermoplastic composites KW - protective coating systems KW - tribology KW - wear KW - physical vapour deposition Y1 - 2016 U6 - https://doi.org/10.5539/jmsr.v5n1p97 SN - 1927-0585 VL - 5 IS - 1 SP - 97 EP - 106 ER - TY - GEN A1 - Schulze, Marcus A1 - Seidlitz, Holger A1 - König, Franziska A1 - Weiß, Sabine T1 - Highly wear resistant PVD coatings for CFRP based multi-layer construction T2 - 11th International Scientific-Technical Conference on Advances in Plastics Technology (APT'15) Y1 - 2015 SN - 978-83-63555-47-4 CY - Gliwice ER - TY - CHAP A1 - Schulze, Marcus A1 - Seidlitz, Holger A1 - König, Franziska A1 - Weiß, Sabine ED - Dobrzański, Leszek A. T1 - Nanoindentation measurements of PVD coated multilayer constructions T2 - Programme and proceedings of the 22nd Winter International Scintific Conference on Achivements in Mechanical and Materials Engineering (AMME'15), Gliwice - Zakopane (Poland), 2015 Y1 - 2015 SN - 978-83-63553-39-5 PB - Gliwice CY - International OCSCO World Press ER -