TY - CONF A1 - Pulz, Robert T1 - Thermoschockverhalten von Keramiken T2 - Werkstoff- und Fügetechnisches Kolloquium an der Otto-von-Guericke Universität Magdeburg CY - Magdeburg, Germany DA - 2009-01-27 PY - 2009 AN - OPUS4-18576 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Varin, R.A. A1 - Czujko, T. A1 - Chiu, C. A1 - Pulz, Robert A1 - Wronski, Z. S. T1 - Synthesis of nanocomposite hydrides for solid-state hydrogen storage by controlled mechanical milling techniques KW - Hydrogen storage materials KW - Nanocomposite hydrides KW - Rule-of-mixtures KW - Mechanical milling KW - X-ray diffraction KW - Differential scanning calorimetry PY - 2009 DO - https://doi.org/10.1016/j.jallcom.2008.07.207 SN - 0925-8388 SN - 1873-4669 VL - 483 IS - 1-2 SP - 252 EP - 255 PB - Elsevier Sequoia CY - Lausanne AN - OPUS4-20282 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Schloesser, J. A1 - Bäker, M. A1 - Rösler, J. A1 - Pulz, Robert T1 - Oxidation behavior of thermal barrier coatings on copper substrates N2 - In rocket engine combustion chambers, the cooling channels experience extremly high temperatures and environmental attack. Thermal protection can be provided by Thermal Barrier Coatings. Due to the need of good heat conduction, the inner combustion liner is made of copper. The performance of a standard coating system for nickel based substrates is investigated on copper substrates. Thermal cycling experiments are performed on the coated samples. Due to temperature limitations of the copper substrate material, no thermally grown oxide forms at the interface of the thermal barrier coating and the bond coat. Delamination of the coatings occurs at the interface between the substrate and the bond coat due to oxide formation of the copper at uncoated edges. In real service a totally dense coating can probably not be assured which is the reason why this failure mode is of importance. Different parameters are used for thermal cycling to understand the underlying mechanisms of delamination. Furthermore, laser heating experiments account for the high thermal gradient in real service. Pilot tests which led to a delamination of the coating at the substrate interface were performed successfully. KW - Thermal barrier coating KW - Copper substrate KW - Rocket engine KW - Oxidation protection PY - 2010 DO - https://doi.org/10.4028/www.scientific.net/AST.66.74 SN - 1662-0356 VL - 66 SP - 74 EP - 79 PB - Techna CY - Faenza AN - OPUS4-22125 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pulz, Robert A1 - Rehmer, Birgit T1 - Laser thermal shock experiments - performance and evaluation on the basis of advanced ceramics N2 - The thermal shock behaviour in air and vacuum of three different advanced ceramics is investigated by introducing a new testing method. This thermal shock testing system permits the reproducible setting of defined temperature profiles in thin disks. In order to perform heating - up thermal shock experiments under reproducible conditions and to measure the transient temperature fields, a laser beam is directed spirally across the surface of the specimen. In this process, the specimen is heated up faster than the temperature gradient is compensated by thermal conductivity. Resulting temperature fields were recorded space and time resolved. Based on the knowledge of the local temperature distribution at the moment of failure, the critical fracture stress can be calculated. The scatter of thermal shock strength is quantitatively determined for the tested ceramics by using a improved statistical method. KW - Thermal shock KW - Weibull statistics KW - Environmental media PY - 2011 DO - https://doi.org/10.1088/1757-899X/18/20/202019 SN - 1757-899X N1 - Serientitel: IOP Conference Series: Materials Science and Engineering – Series title: IOP Conference Series: Materials Science and Engineering IS - Symposium 14 SP - 202019, 1 EP - 4 AN - OPUS4-33028 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pulz, Robert T1 - Laser Thermal Shock Experiments - Performance and Evaluation on the Basis of Advanced Ceramics T2 - ICC 3 CY - Osaka, Japan DA - 2010-11-17 PY - 2010 AN - OPUS4-22635 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pulz, Robert A1 - Rehmer, Birgit T1 - Thermal shock behaviour of ceramics under different testing conditions N2 - Beside the presentation of interesting parts of the experimental equipment the thermal shock behaviour of two ceramics will be discussed. Specimens of silicon carbide and zirconia were investigated in air and vacuum. The influence of the testing conditions on the strength will be addressed. KW - Thermal shock KW - Ceramics KW - Different media PY - 2010 DO - https://doi.org/10.1088/1742-6596/240/1/012162 SN - 1742-6588 SN - 1742-6596 VL - 240 IS - 1 SP - 012162-1 - 012162-4 PB - IOP Publ. CY - Bristol, UK AN - OPUS4-22161 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maierhofer, Christiane A1 - Harrer, Andrea A1 - Nies, Daniel A1 - Pulz, Robert A1 - Röllig, Mathias A1 - Rehmer, Birgit T1 - Untersuchung von Transport- und Schädigungsprozessen in Keramiken und mineralischen Baustoffen mit lokal und global angeregter aktiver Thermografie N2 - In diesem Beitrag wird die Entwicklung eines aktiven Thermografieverfahrens zur zeit- und ortsaufgelösten in-situ und Echtzeit-Visualisierung von Transport- und Schädigungsprozessen für Anwendungen in Industrie und Umwelt vorgestellt. Das Verfahren ermöglicht unter Verwendung verschiedener thermischer Anregungsquellen u.a. die Bestimmung der thermischen Materialeigenschaften von Keramiken und trockenen und feuchten mineralischen Baustoffen. Schädigungsprozesse in Keramiken können in-situ visualisiert werden. Weiterhin werden Messergebnisse vorgestellt, die während des kapillaren Feuchtetransports in Naturstein erfasst wurden und diesen abbilden können. T2 - Sensoren und Messsysteme 2010 - 15. ITG/GMA-Fachtagung CY - Nürnberg, Deutschland DA - 2010-05-18 PY - 2010 SN - 978-3-8007-3260-9 IS - Paper 116 SP - 658 EP - 663 PB - VDE Verlag GmbH CY - Berlin, Offenbach AN - OPUS4-21949 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pulz, Robert T1 - Thermal shock testing of ceramics T2 - 15 International Conference on the Strength of Materials CY - Dresden, Germany DA - 2009-08-16 PY - 2009 AN - OPUS4-18676 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pulz, Robert T1 - Thermal shock behavior of ceramics at different ambient media T2 - Junior EuroMat 2008 CY - Lausanne, Switzerland DA - 2008-07-14 PY - 2008 AN - OPUS4-16498 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pulz, Robert T1 - Thermal shock testing of ceramics under different testing conditions T2 - Euromat 2009 CY - Glasgow, Scotland DA - 2009-09-06 PY - 2009 AN - OPUS4-18776 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Feigl, Michael A1 - Nofz, Marianne A1 - Sojref, Regine A1 - Dressler, Martin A1 - Pulz, Robert A1 - Rehmer, Birgit A1 - Feldmann, Ines A1 - Sabel, Martin T1 - Aluminiumoxidschichten für den Oxidationsschutz von Hochtemperaturlegierungen N2 - Effektive Al2O3-Keramik-Schutzschichten könnten die Verwendung preiswerterer Legierungen für Hochtemperaturanwendungen ermöglichen. Die Anforderungen an diese Schichten sind eine gute Haftung, chemische Stabilität und Dichtheit gegen die Umgebungsatmosphäre. T2 - DKG-Jahrestagung/Symposium Hochleistungskeramik CY - Aachen, Germany DA - 23.03.2009 KW - Schichtherstellung KW - Schichttestung KW - Hochtemperaturanwendungen PY - 2009 AN - OPUS4-35836 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -