TY - RPRT A1 - Recknagel, Christoph A1 - Eilers, M. A1 - Alte-Teigeler, R. A1 - Borchers, R. A1 - Commer, T. A1 - Gallai, G. A1 - Goldschmidt, M. A1 - Habiger, D. A1 - Karczewski, B. A1 - Koll, R.-J. A1 - Lorenz, S. A1 - Marossow, H. A1 - Rossi, M. A1 - Schneider, T. A1 - Seiffart, J. A1 - Staeck, M. A1 - Stark, S. A1 - Wehner, H. A1 - Willand, E. T1 - Hinweise für die Herstellung von Fahrbahnübergängen aus Poyurea oder Polyurethan für Ingenieurbauten - H FüPP N2 - Diese Hinweisbroschüre erläutert allgemeine Planungsvoraussetzungen und Dimensionierungsregelungen, Baugrundsätze und Zulassungsbedingungen zur Anwendung innovativer Belagsdehnfugensysteme (Fahrbahnübergangskonstruktionen) in hochbeanspruchten Verkehrsflächen des Bundesfernstraßenbereiches. Alle planungsrelevanten, baustoffrelevanten, versuchstechnische, qualitätssichernden und baupraktischen Aspekte werden zur Unterstützung der Straßenbauverwaltungen, der Lieferfirmen und Ausführungsbetriebe erläutert. Die Veröffentlichung stellt eine technische Analyse aus Erfahrungssammlungen und Auswertung praktischer Erkenntnisse dar. KW - Brückenbeläge KW - Fahrbahnübergänge KW - Dehnfugenkonstruktionen KW - technische und technologische Anforderungen PY - 2022 SN - 978-3-86446-355-6 VL - 778 SP - 1 EP - 47 PB - Forschungsgesellschaft für Straßen- und Verkehrswesen CY - Köln AN - OPUS4-59374 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - INPR A1 - Glauber, J.-P. A1 - Lorenz, J. A1 - Liu, J. A1 - Seifert, M. A1 - Hoffmann, V. A1 - Abad Andrade, Carlos Enrique A1 - Rogalla, D. A1 - Harms, C. A1 - Wark, M. A1 - Nolan, M. A1 - Devi, A. T1 - High Quality Crystalline VN Thin Films via MOCVD from a New Vanadium Precursor: Linking Growth Chemistry to Functional Catalytic Surfaces N2 - Vanadium nitride (VN) has been identified as a promising material for numerous applications including electrochemical nitrogen reduction reaction (eNRR). For such applications, catalyst nanoengineering will help to experimentally test its theoretically predicted eNRR activity, but the majority of investigated VN catalysts are prepared by fabrication methods that do not allow for nanoengineering to the required degree. Herein, we report on a new metalorganic chemical vapor deposition (MOCVD) process for the growth of high quality, facetted and crystalline VN thin films relevant for eNRR applications. N,N’-diisopropylformamidinato [V(dpfamd)3] was identified as a promising precursor as it possesses favorable thermal properties relevant for MOCVD. The application of [V(dpfamd)3] in a MOCVD process with NH3 as co-reactant yielded crystalline VN thin films on Si substrates with high compositional purity. With the potential of using the catalytic activity of VN towards eNRR, the structure-property correlation is of relevance and in this context, the thin films were subjected to complementary analysis including X-ray diffraction (XRD), Rutherford backscattering spectrometry in combination with nuclear reaction analysis (RBS/NRA), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Based on the observation of the significant influence NH3 has on the growth characteristics, we conducted first principles density functional theory (DFT) simulations of the precursor reactivity in the absence and presence of NH3 towards VN, supporting experimental findings of energetically more favorable decomposition of [V(dpfamd)3] to VN in the presence of NH3. Process transfer from Si to conductive Ti substrates, relevant for prospective electrochemical testing, revealed comparable VN thin film properties rendering these films promising for further investigation of eNRR applications in follow up studies. KW - Metal nitrades KW - MOCVD KW - Nitrogen reduction reaction KW - Precursors KW - DFT PY - 2025 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-648600 DO - https://doi.org/10.26434/chemrxiv-2025-1t4gq SP - 1 EP - 25 AN - OPUS4-64860 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Jüttner, K. A1 - Lorenz, W. J. A1 - Paatsch, Wolfgang A1 - Kendig, M. A1 - Mansfeld, F. T1 - Bedeutung der dynamischen Systemanalyse für Korrosionsuntersuchungen in Forschung und Praxis PY - 1985 SN - 0043-2822 SN - 1521-4176 VL - 36 SP - 120 EP - 130 PB - Verl. Chemie CY - Weinheim, Bergstr. AN - OPUS4-33919 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Boeck, T. A1 - Schmidt, K. A1 - Lorenz, M. A1 - Rosenfeld, A. A1 - Rudolph, Pascale A1 - Krüger, Jörg A1 - Kautek, Wolfgang ED - Gobrecht, J. T1 - Ultra-short pulse laser seeding techniques for silicon crystallite growth on amorphous substrates T2 - QUANTSOL 99 CY - Wildhaus, Switzerland DA - 1999-03-14 PY - 1999 SP - 1(?) EP - 3(?) AN - OPUS4-12041 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mishmastnehi, Moslem A1 - Stawski, Tomasz M. A1 - Eftekhari, Negar A1 - Schneider, Kathrin P. A1 - Vaccaro, Carmela A1 - Aghajani, Iman A1 - Grbanovic, Ana Marija A1 - Korn, Lorenz T1 - Unveiling the craftsmanship and knowledge behind iranian stuccoes (11th–14th centuries): New insights from an archaeometric perspective N2 - Gypsum-based stucco decorations of 47 monuments in Iran, from the Seljuq to the Ilkhanid period (11th-14th centuries), were studied by multimodal analytical methods, including X-ray diffraction, X-ray fluorescence, scanning electron microscopy and image analysis to evaluate their composition properties. The assessment of results shows that stucco masters in those periods exerted control over the setting process of the gypsum-paste and its microstructure by adjusting water-to-plaster ratio, fine-clay addition, and by means of mechanical processing. Furthermore, the presence of anhydrite in the composition of stucco decorations located in the hot-desert climate of Iran provides evidence for the probability of gypsum-anhydrite transition, which has technical and preservation consequences for this less-investigated type of cultural materials. KW - Gypsum KW - Diffraction KW - Anhydrite KW - Calcium sulfate PY - 2025 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-628406 DO - https://doi.org/10.1016/j.jas.2025.106199 SN - 1095-9238 VL - 177 SP - 1 EP - 13 PB - Elsevier B.V. AN - OPUS4-62840 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Eilers, M. A1 - Alte-Teigeler, R. A1 - Borchers, R. A1 - Gallai, G. A1 - Habiger, D. A1 - Recknagel, Christoph A1 - Karczewski, B. A1 - Koll, J. A1 - Lorenz, S. A1 - Marossow, H. A1 - Schneider, Th. A1 - Seiffart, J. A1 - Stark, S. A1 - et al., T1 - Technische Prüfvorschriften für Fahrbahnübergänge aus Asphalt, TL/TP-ING - Teil 6, Abschnitt 7 N2 - Technische Lieferbedingungen und Technische Prüfvorschriften für Ingenieurbauten KW - Brückenbeläge KW - Asphaltbauweisen KW - Fahrbahnübergänge PY - 2022 SN - 978-3-86446-343-3 VL - 780/3 SP - 1 EP - 26 PB - FGSV Verlag GmbH CY - Köln AN - OPUS4-56218 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Eilers, M. A1 - Alte-Teigeler, R. A1 - Borchers, R. A1 - Gallai, G. A1 - Habiger, D. A1 - Recknagel, Christoph A1 - Karczewski, B. A1 - Koll, J. A1 - Lorenz, S. A1 - Marossow, H. A1 - Schneider, Th. A1 - Seiffart, J. A1 - Stark, S. A1 - et al., T1 - Technische Lieferbedingungen für die Baustoffe zur Herstellung von Fahrbahnübergängen aus Asphalt (TL ING, Teil 6, Abschnitt 7) N2 - TL BEL-FÜ Technische Lieferbedingungen für die Baustoffe zur Herstellung von Fahrbahnübergängen aus Asphalt TL/TP-Ing - Teil 6, Abschnitt 7 Technische Lieferbedingungen und Technische Prüfvorschriften für Ingenieurbauten KW - Brückenbeläge KW - Asphaltbauweisen KW - Fahrbahnübergänge PY - 2022 SN - 978-3-86446-342-6 VL - 780/2 SP - 1 EP - 20 PB - FGSV Verlag GmbH CY - Köln AN - OPUS4-56216 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kautek, Wolfgang A1 - Rudolph, Pascale A1 - Krüger, Jörg A1 - Rosenfeld, A. A1 - Lorenz, M. A1 - Ashkenasi, D. T1 - Morphological and mechanical investigations of bariumalumoborosilicate glass surfaces processed with 700-fs laser pulses N2 - We present surface micro-modifications of bariumalumoborosilicate glasses with a high transformation temperature near 700 °C. Laser processing of the glass substrate was realized by using ultra-short laser pulses at 800 nm. The morphological conversion of the laser-treated surfaces was characterized by scanning force microscopy and nano-indentation. A hardness increase by at least a factor of six on the laser ablation crater edge relative to illuminated non- ablated areas shows that the material in the crater walls underwent drastic morphological and mechanical changes. In this heat- and shock-affected zone, the material became more elastic as a result of increased stress. T2 - 5th International Conference on Laser Ablation ; COLA '99 CY - Göttingen, Germany DA - 1999-07-19 KW - Bariumalumoborosilicate glass surfaces PY - 1999 DO - https://doi.org/10.1007/s003390051523 SN - 0947-8396 VL - 69 IS - 7 SP - S759 EP - S761 PB - Springer CY - Berlin AN - OPUS4-775 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Braun, Ulrike A1 - Lorenz, Edelgard A1 - Weimann, Christiane A1 - Sturm, Heinz A1 - Karimov, I. A1 - Ettl, J. A1 - Meier, R. A1 - Wohlgemuth, W. A. A1 - Berger, H. A1 - Wildgruber, M. T1 - Mechanic and surface properties of central-venous port catheters after removal: A comparison of polyurethane and Silicon rubber materials N2 - Central venous port devices made of two different polymeric materials, thermoplastic polyurethane (TPU)and silicone rubber (SiR), were compared due their material properties. Both naïve catheters as well as catheters after removal from patients were investigated. In lab experiments the influence of various chemo-therapeutic solutions on material properties was investigated, where as the samples after removal were compared according to the implanted time inpatient. The macroscopic,mechanical performance was assessed with dynamic, specially adapted tests for elasticity. The degradation status of the materials was determined with common tools of polymer characterisation, such as infrared spectroscopy, molecular weight measurements and various methods of thermal analysis. The surface morphology was an alysed using scanning electron microscopy. A correlation between material properties and clinical performance was proposed. The surface morphology and chemical composition of the polyurethane catheter materials can potentially result in increased susceptibility of the catheter to bloodstream infections and thrombotic complications. The higher mechanic failure,especially with increasing implantation time of the silicone catheters is related to the lower mechanical performance compared to the polyurethane material as well as loss of barium sulphate filler particles near the surface of the catheter. This results in preformed microscopic notches, which act as predetermined sites of fracture. KW - Thermoplastic polyurethane (TPU) KW - Silicone rubber (SiR) KW - Catheters KW - Central venous access port KW - Complication KW - Structure propertyrelationship KW - Mechanical testing PY - 2016 DO - https://doi.org/10.1016/j.jmbbm.2016.08.002 SN - 1751-6161 SN - 1878-0180 VL - 64 SP - 281 EP - 291 PB - Elsevier Ltd. AN - OPUS4-37178 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Polte, J. A1 - Polte, M. A1 - Lorenz, D. A1 - Oberschmidt, D. A1 - Sturm, Heinz A1 - Uhlmann, E. T1 - Binderless-cBN as cutting material for ultra-precision machining of stainless steel N2 - The ultra–precision cutting of steel materials is possible but needs modifications of machine tools or the workpiece material. One approach of actual research is the development of cutting materials that gives the opportunity for direct cutting of surfaces with ultra–precision quality. Binderless–cBN is here one of the most promising materials. The paper shows results of experimental studies with binderless–cBN as cutting material while turning stainless steel. Various investigations were carried out to determine the wear mechanisms. Furthermore, measurements are shown regarding the surface quality. The achieved results show the high potential ofbinderless–cBN as cutting material for the machining of steel. KW - Cubic boron nitride KW - Stainless steel KW - Ultra-precision PY - 2014 DO - https://doi.org/10.4028/www.scientific.net/AMR.1018.107 SN - 1022-6680 SN - 1662-8985 VL - 1018 SP - 107 EP - 114 PB - Trans Tech Publ. CY - Zurich AN - OPUS4-32377 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -