TY - GEN A1 - Österle, Werner A1 - Urban, Ingrid A1 - Gesatzke, Wolfgang A1 - Rooch, Heidemarie ED - Bartz, Wilfried J. T1 - Characterization and evaluation of the formation of friction layers during braking with conventional PMC friction material against a cast iron rotor T2 - 14th International Colloquium Tribology, "Tribology and Lubrication Engineering" CY - Stuttgart, Germany DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - 1 SP - 483 EP - 489 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3494 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Dörfel, Ilona A1 - Gesatzke, Wolfgang A1 - Rooch, Heidemarie A1 - Urban, Ingrid T1 - Charakterisierung tribologischer Kontakte mit FIB und TEM KW - FIB KW - TEM KW - Verbundwerkstoff KW - Bremse KW - Diamantschicht PY - 2004 SN - 0032-678X N1 - Sprachen: Deutsch/Englisch - Languages: German/English VL - 41 IS - 4 SP - 166 EP - 179 PB - Hanser CY - München AN - OPUS4-3496 LA - mul AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Rooch, Heidemarie A1 - Pyzalla, A. A1 - Wang, L. T1 - Investigation of white etching layers on rails by optical microscopy, electron microscopy, X-ray and synchrotron X-ray diffraction N2 - Patches of white etching layers on rail surfaces were investigated using sophisticated techniques like cross-sectional transmission electron microscopy (XTEM) and synchroton X-ray diffraction. Optical microscopy failed to resolve the microstructure, but in the TEM submicron grains with high dislocation densities and occasional twins, which are characteristic features of high carbon martensite, were observed. The martensitic structure was confirmed by evaluation of synchroton X-ray diffraction line profiles. The latter technique also allowed to determine dislocation densities of the order of 1012 cm-2 and residual compressive stresses of about 200 MPa. KW - Cross-sectional transmission electron microscopy KW - White etching layers KW - X-ray diffraction PY - 2001 U6 - https://doi.org/10.1016/S0921-5093(00)01842-6 SN - 0921-5093 SN - 1873-4936 VL - 303 SP - 150 EP - 157 PB - Elsevier CY - Amsterdam AN - OPUS4-2370 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Engelhardt, Monika A1 - Gesatzke, Wolfgang A1 - Österle, Werner A1 - Müller, Urs A1 - Rooch, Heidemarie A1 - Saliwan Neumann, Romeo A1 - Urban, Ingrid T1 - Makro- und Mikrogefüge von Bremsbelägen KW - Bremsbelag KW - Polymermatrix-Verbundstoff KW - Röntgenfluoreszenzanalyse KW - REM KW - FIB KW - TEM PY - 2005 SN - 3-88355-343-3 SN - 0343-3579 N1 - Serientitel: Sonderbände der praktischen Metallographie – Series title: Sonderbände der praktischen Metallographie IS - 37 SP - 105 EP - 110 PB - Werkstoff-Informationsges. CY - Frankfurt AN - OPUS4-10996 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Dörfel, Ilona A1 - Rooch, Heidemarie A1 - Österle, Werner T1 - Microstructural differences between two Zr(C,N) coatings revealed by analytical transmission electron microscopy N2 - The microstructures of two samples of a Zr(C,N) coating on steel, which unexpectedly differed in their tribological properties, were investigated by analytical transmission electron microscopy. The samples were produced by a cathodic arc evaporation process in two commercial coating devices under similar coating conditions with the exception of the number of Zr targets. The source of the differing tribological properties of the samples was detected by analytical transmission electron microscopy (TEM) methods energy-dispersive X-ray spectroscopy (EDX), energy filtering TEM (EFTEM), electron diffraction, high resolution electron microscopy, and high angel annular dark field. The TEM preparation and the results of the TEM investigations are shown in detail. The origin of the unexpected behavior was determined to be a nano-scale multilayer structure that existed only in the tribologically superior specimen. EDX and EFTEM investigations indicated enrichment in oxygen at the interface between coating and steel substrate in the tribologically inferior sample. Findings of the microstructural configuration were obtained by taking a closer look at the structure and comparing the results of the several analytical TEM techniques. This allows the allocation of the concentration fluctuations in N, C, and Zr to the two thickness fractions of the nano multilayers and a local correlation of the identified minority phase Zr3(C,N)4 to the higher N content in the narrower type of the multilayer fraction of the sample with the excellent tribological properties. The minority phase Zr3(C,N)4 is randomly distributed in the sample with the defective tribological properties. Coating conditions are not topic of this work, but after discussion of the TEM results, the fact that one of the coating devices worked with one Zr target and the other one with two, could be identified as cause for the formation of the nano multilayer structure in the sample with the superior tribological properties. KW - Analytical transmission electron microscopy KW - Tribological coatings KW - Multilayers KW - Analytical TEM KW - Coatings KW - Nano-multilayer PY - 2012 U6 - https://doi.org/10.1016/j.tsf.2012.02.051 SN - 0040-6090 VL - 520 IS - 13 SP - 4275 EP - 4281 PB - Elsevier CY - Amsterdam AN - OPUS4-25657 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Senoner, Mathias A1 - Sahre, Mario A1 - Rooch, Heidemarie A1 - Unger, Wolfgang ED - Weckenmann, A. T1 - Neuartige, räumlich strukturierte Testproben für die Bestimmung der Abbildungsqualität und die Kalibrierung der Längenskala in der Rastersondenmikroskopie T2 - Abschlusskolloquium DFG Schwerpunktprogramm 1159 - Neue Strategien der Mess- und Prüftechnik für die Produktion von Mikrosystemen und Nanostrukturen CY - Erlangen, Germany DA - 2010-10-06 KW - MOVPE KW - Rasterkraftmikroskopie KW - Referenzmaterial KW - Schichtstapel KW - Selektives Ätzen KW - Spitzencharakterisierer KW - TEM PY - 2011 SN - 978-3-8440-0358-1 SN - 0945-0769 SP - 116 EP - 129 PB - Shaker Verlag GmbH AN - OPUS4-24790 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Rooch, Heidemarie A1 - Urban, Ingrid A1 - Gesatzke, Wolfgang T1 - Zielpräparation mittels Focused Ion Beam für TEM-Untersuchungen, FIB-Präparation an mechanisch stark verformten Oberflächen und an Schichten, bei denen hohe innere Spannungen auftreten T2 - FIB-Workshop CY - Lucerne, Switzerland DA - 2008-07-03 PY - 2008 AN - OPUS4-17685 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kranzmann, Axel A1 - Hünert, Daniela A1 - Rooch, Heidemarie A1 - Urban, Ingrid A1 - Schulz, Wencke A1 - Österle, Werner T1 - Reactions at the interface between steel and oxide scale in wet CO2 containing atmospheres N2 - The resistance of structural steels against corrosion in CO2-H2O and CO2-H2O-O2 atmospheres at temperatures above 550°C was observed with high magnification methods. The test atmosphere is the basic composition of an oxyfuel coal combustion atmosphere. The analytical information base was applied to develop reaction schemes for the oxidation of steels. It was demonstrated that the formation of phases and the kinetics of oxidation reactions in this atmospheres is affected by the formation of intermediate iron hydroxide and a high carbon activity. In the temperature regime above 550°C the thermal equilibrium between H2O, CO2 and Fe reacted and formed CO. CO triggers the formation of FeO and carbides and increases the reaction kinetics. Porosity at the interface is established by gaseous phases such as Fe(OH)2 or H2O. H2 formation is not limited to the steel - oxide interface but can occur in the whole oxide scale. Examples of the experimental results were compared with a thermodynamic approach. The objective of the work was to derive qualitative rules of the basic corrosion reactions. T2 - NACE International corrosion conference 2009 CY - Atlanta, Georgia, USA DA - 2009-03-22 KW - High temperature corrosion KW - Corrosion gases KW - Mild steels KW - 9-12% Cr-steels KW - Hydrogen transport KW - Oxyfuel combustion PY - 2009 SP - 1 EP - 10 (Paper 09265) AN - OPUS4-22334 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Österle, Werner A1 - Deutsch, Cornelius A1 - Rooch, Heidemarie A1 - Dörfel, Ilona T1 - Friction films on C-SiC discs after dynamometer tests with different commercial brake pads T2 - EuroBrake 2012 CY - Dresden, Germany DA - 2012-04-16 KW - Ceramic disc KW - Friction film KW - PMC-pad KW - SM-pad KW - Third body PY - 2012 IS - EB2012-FM-01 SP - 1 EP - 9 AN - OPUS4-26823 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Merk, Virginia A1 - Schulte, Franziska A1 - Rooch, Heidemarie A1 - Feldmann, Ines A1 - Dörfel, Ilona A1 - Österle, Werner A1 - Panne, Ulrich A1 - Kneipp, Janina T1 - Surface-enhanced Raman scattering with silver nanostructures generated in situ in a sporopollenin biopolymer matrix N2 - Silver nanoparticles were generated based on citrate reduction in the ultrastructure of the sporopollenin biopolymer of Ambrosia artemisiifolia (ragweed) and Secale cereale (rye). The nanoparticles enable the acquisition of SERS spectra and thereby a vibrational characterization of the local molecular structure of sporopollenin. PY - 2011 U6 - https://doi.org/10.1039/c0cc05326k SN - 0022-4936 SN - 0009-241x SN - 1359-7345 SN - 1364-548x N1 - Geburtsname von Merk, Virginia: Joseph, V. - Birth name of Merk, Virginia: Joseph, V. VL - 47 IS - 11 SP - 3236 EP - 3238 PB - Royal Society of Chemistry CY - Cambridge AN - OPUS4-23482 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Dörfel, Ilona A1 - Prietzel, Claudia A1 - Rooch, Heidemarie A1 - Cristol-Bulthé, A.-L. A1 - Defallaix, G. A1 - Desplanques, Y. T1 - A comprehensive microscopic study of third body formation at the interface between a brake pad and brake disc during the final stage of a pin-on-disc test KW - Brake KW - Third body KW - Wear KW - Friction KW - Nano-scale KW - TEM PY - 2009 U6 - https://doi.org/10.1016/j.wear.2008.11.023 SN - 0043-1648 VL - 267 IS - 5-8 SP - 781 EP - 788 PB - Elsevier CY - Amsterdam AN - OPUS4-19450 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Senoner, Mathias A1 - Maaßdorf, A. A1 - Rooch, Heidemarie A1 - Österle, Werner A1 - Malcher, M. A1 - Schmidt, M. A1 - Kollmer, F. A1 - Paul, D. A1 - Hodoroaba, Vasile-Dan A1 - Rades, Steffi A1 - Unger, Wolfgang T1 - Lateral resolution of nanoscaled images delivered by surface-analytical instruments: application of the BAM-L200 certified reference material and related ISO standards N2 - The certified reference material BAM-L200, a nanoscale stripe pattern for length calibration and specification of lateral resolution, is described. BAM-L200 is prepared from a cross-sectioned epitaxially grown layer stack of AlxGa1–xAs and InxGa1–xAs on a GaAs substrate. The surface of BAM-L200 provides a flat pattern with stripe widths ranging down to 1 nm. Calibration distances, grating periods and stripe widths have been certified by TEM with traceability to the length unit. The combination of gratings, isolated narrow stripes and sharp edges of wide stripes offers plenty of options for the determination of lateral resolution, sharpness and calibration of length scale at selected settings of imaging surface-analytical instruments. The feasibility of the reference material for an analysis of the lateral resolution is demonstrated in detail by evaluation of ToF-SIMS, AES and EDX images. Other applications developed in the community are summarized, too. BAM-L200 fully supports the implementation of the revised International Standard ISO 18516 (in preparation) which is based on knowledge outlined in the Technical Report ISO/TR 19319:2013. KW - AES KW - BAM-L200 KW - CRM KW - EDX KW - Imaging KW - Lateral resolution KW - Sharpness KW - Standardisation KW - STXM KW - ToF-SIMS KW - XPEEM KW - XPS KW - Certified reference material KW - Imaging surface analysis PY - 2015 U6 - https://doi.org/10.1007/s00216-014-8135-7 SN - 1618-2642 SN - 1618-2650 VL - 407 IS - 11 SP - 3211 EP - 3217 PB - Springer CY - Berlin AN - OPUS4-33033 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schempp, Philipp A1 - Cross, C.E. A1 - Pittner, Andreas A1 - Oder, Gabriele A1 - Neumann, R.S. A1 - Rooch, Heidemarie A1 - Dörfel, Ilona A1 - Österle, Werner A1 - Rethmeier, Michael T1 - Solidification of GTA aluminium weld metal: Part I - Grain morphology dependent upon alloy composition and grain refiner content KW - Aluminium KW - Gas tungsten arc welding (GTAW) KW - Grain refinement KW - Columnar to equiaxed transition (CET) KW - Epitaxial nucleation KW - Duplex nucleation theory PY - 2014 SN - 0043-2296 SN - 0096-7629 VL - 93 SP - 53-s - 59-s PB - American Welding Society CY - New York, NY AN - OPUS4-30413 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Gesatzke, Wolfgang A1 - Österle, Werner A1 - Rooch, Heidemarie A1 - Urban, Ingrid ED - Portella, Pedro Dolabella T1 - Präparation von Mikro-Querschnitten mit dem fokussierten Ionenstrahl (FIB) T2 - 37. Metallographie-Tagung CY - Berlin, Deutschland DA - 2003-09-17 PY - 2004 SN - 3-88355-322-0 SN - 0343-3579 N1 - Serientitel: Sonderbände der praktischen Metallographie – Series title: Sonderbände der praktischen Metallographie IS - 35 SP - 145 EP - 149 PB - Werkstoff-Informationsges. CY - Frankfurt AN - OPUS4-7641 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -