TY - CONF A1 - Skrotzki, Birgit T1 - Ermüdungsverhalten des warmfesten austenitischen Gusseisens EN-GJSA-XNiSiCr35-5-2 bei hoher Temperatur T2 - Kolloquium des Instituts für Materialphysik CY - Westfälische Wilhelms-Universität Münster DA - 2015-07-21 PY - 2015 AN - OPUS4-33739 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Maurino, V. T1 - Experimental Approaches and Paradigms for Shape controlled Synthsis of TiO2 Nanoparticles T2 - International summer workshop NANOSCIENCE meets METROLOGY CY - Erice, Italy DA - 2015-07-27 PY - 2015 AN - OPUS4-33874 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Skrotzki, Birgit T1 - Ermüdungsverhalten des warmfesten austenitischen Gusseisens EN-GJSA-XNiSiCr35-5-2 bei hoher Temperatur T2 - Karlsruher Werkstoffkolloquium CY - Karlsruhe DA - 2015-11-10 PY - 2015 AN - OPUS4-34784 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Olbricht, Jürgen T1 - Size Effects in Miniature Specimen Creep Testing of Heat Resistant Ferritic-Martensitic Steels T2 - 13th International Conference on Creep and Fracture of Engineering Materials and Structures CY - Toulouse, France DA - 2015-05-31 PY - 2015 AN - OPUS4-33466 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hartelt, Manfred A1 - Wäsche, Rolf A1 - Hodoroaba, Vasile-Dan T1 - Verschleißpartikel-Analyse mit Rasterelektronenmikroskopie und energiedispersiver Röntgenspektrometrie im Transmissionsmodus (TSEM/EDX) N2 - Untersucht wurden Verschleißpartikel als elektronentransparente Proben auf dünnen Trägerfolien mit einem hochauflösendem Rasterelektronenmikroskop und energiedispersiver Röntgenspektrometrie im Transmissionsmodus. Die hohe laterale Auflösung dieser modernen Methoden ermöglicht eine morphologische Charakterisierung der Verschleißpartikel bis in den nm-Bereich. Die hochauflösende Elementanalyse erlaubt eine Interpretation der Zusammensetzung und damit Rückschlüsse auf die Verschleißpartikelbildung. Die tribologischen Untersuchungen sind an einem Modell-Verschleißtribometer nach DIN 51834-2 geschmiert, aber ohne Ölkreislauf, durchgeführt worden. Die Präparation der Verschleißpartikel über eine Entnahme und Übertragung einer geringen Schmierstoffmenge mit einer Mikropipette auf eine TEM-Trägerfolie ist mit einem geringen Aufwand möglich. Der präparative Aufwand ist relativ gering. Das benötigte Schmierstoffvolumen beträgt wenige Mikroliter (0,001 ml). Die Untersuchung zeigt die geringe geometrische Größe der Verschleißpartikel und bestätigt indirekt die These der Reaktionsschichtbildung mit einer geringen Schichtdicke, die ständig verschleißt und sich stetig neu bildet. Die beschriebenen Verschleißprozesse sind in der Modell-Verschleiß-Prüfung mit sehr hohen Pressungen am Versuchsbeginn nachweisbar. KW - Modellverschleißprüfung KW - Verschleißpartikel-Analyse KW - TSEM PY - 2015 SN - 0724-3472 VL - 62 IS - 6 SP - 5 EP - 11 PB - Expert Verlag CY - Renningen AN - OPUS4-35043 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hodoroaba, Vasile-Dan T1 - Determination of the Collection Solid Angle of EDS Detectors T2 - EMAS 2015 - 14th European Workshop on Modern Developments and applications in microbeam analysis CY - Portoroz, Slovenia DA - 2015-05-03 PY - 2015 AN - OPUS4-33249 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kupsch, Andreas T1 - Compton-CT als Alternative zur Neutronentomographie? T2 - DACH Jahrestagung 2015 CY - Salzburg, Austria DA - 2015-05-11 PY - 2015 AN - OPUS4-33481 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bruno, Giovanni T1 - Moderne bildgebende hochauflösende Röntgenverfahren für die quantitative Charakterisierung des Bruchverhaltens von Kompositlaminaten T2 - Gefüge & Bruch Tagung CY - Leoben, Austria DA - 2015-04-08 PY - 2015 AN - OPUS4-33092 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Vogl, Jochen T1 - Preparation and Characterization of an SI-traceable Mg isotope Reference Material T2 - Primary Reference Materials and Solutions Stakeholder Workshop and Training Course CY - Berlin, Gemany DA - 2015-06-22 PY - 2015 N1 - Geburtsname von Mieller, Björn: Brandt, B. - Birth name of Mieller, Björn: Brandt, B. AN - OPUS4-33601 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mieller, Björn A1 - Rabe, Torsten T1 - Structuring of LTCC Substrates by a Combination of Pressure-Assisted Sintering and Hot Embossing N2 - A novel technology for the structuring of low temperature co-fired ceramic (LTCC) surfaces is introduced. The commercial LTCC Ceramtape GC is shaped in a zero-shrinkage process by embossing a glass-like carbon mold into the softened LTCC during pressure-assisted sintering. Diverse raised and lowered structures including rings, grids, and characters were fabricated. It was found that de-airing of mold cavities is crucial for the molding of embossments. De-airing is possible through pore channels in the LTCC if embossing is performed at intermediate temperatures. The influence of LTCC viscosity on the mold filling behavior during the formation of raised structures is discussed. For accurate molding and proper densification of the LTCC, hot embossing with 0.41 MPa at 775 °C and subsequent heating under load to 850 °C is proposed. Embossing of precise, 40 µm deep circular cavities and 50 µm high raised bars and characters is demonstrated. Thereby, the high potential of the hot-embossing process for micro-patterning of LTCC is illustrated. KW - low temperature co-fired ceramics KW - glass-like carbon KW - hot-embossing KW - pressure-assisted sintering PY - 2015 DO - https://doi.org/10.4416/JCST2015-00051 N1 - Geburtsname von Mieller, Björn: Brandt, B. - Birth name of Mieller, Björn: Brandt, B. VL - 06 IS - 04 SP - 273 EP - 278 AN - OPUS4-35420 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mieller, Björn T1 - Bursting Tensile Strength Testing of brazed joints formed by Reactive Air Brazing with Novel Composite Tapes T2 - EUROMAT 2015 CY - Warsaw, Poland DA - 2015-09-20 PY - 2015 N1 - Geburtsname von Mieller, Björn: Brandt, B. - Birth name of Mieller, Björn: Brandt, B. AN - OPUS4-34298 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Müller, Bernd R. T1 - Characterization of hydrogen assisted cracking using synchrotron computed tomography T2 - IMAGING WORKSHOP BESSY II CY - Berlin-Adlershon, Germany DA - 2015-10-05 PY - 2015 AN - OPUS4-34388 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Müller, Bernd R. A1 - Léonard, Fabien A1 - Lange, Axel A1 - Kupsch, Andreas A1 - Bruno, Giovanni T1 - X-ray refraction techniques for fast, high-resolution microstructure characterization and non-destructive testing of lightweight composites N2 - X-ray refraction is based on optical deflection of X-rays, similar to the well-known small angle X-ray scattering, but hundreds of times more intense, thus enabling shorter measurement time. We show that X-ray refraction techniques are suitable for the detection of pores, cracks, and in general defects. Indeed, the deflected X-ray intensity is directly proportional to the internal specific surface (i.e., surface per unit volume) of the objects. Although single defects cannot be imaged, the presence of populations of those defects can be detected even if the defects have sizes in the nanometer range.We present several applications of X-ray refraction techniques to composite materials:- To visualize macro and microcracks in Ti-SiC metal matrix composites (MMC);- To correlate fatigue damage (fibre de-bonding) of carbon fibre reinforced plastics (CFRP) to X-ray refraction intensity;- To quantify the impact damage by spatially resolved single fibre de-bonding fraction as a function of impact energy in CFRP laminates.An example of classic high-resolution computer tomography of an impact-damaged CFRP will also be presented, as a benchmark to the present state-of-the-art imaging capabilities. It will be shown that while (absorption) tomography can well visualize and quantify delamination, X-ray refraction techniques directly yield (spatially resolved) quantitative information about fibre de-bonding, inaccessible to absorption tomography. KW - X-ray KW - Synchrotron radiation KW - Refraction KW - Metal matrix composites KW - Delamination KW - Fiber de-bonding PY - 2015 DO - https://doi.org/10.4028/www.scientific.net/MSF.825-826.814 SN - 0255-5476 VL - 825-826 SP - 814 EP - 821 PB - Trans Tech Publications CY - Aedermannsdorf, Switzerland AN - OPUS4-33265 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Vogl, Jochen T1 - Absolute Mg isotope ratio measurements T2 - Final Project meeting SIB09 ELEMENTS CY - Berlin, Germany DA - 2015-06-23 PY - 2015 N1 - Geburtsname von Mieller, Björn: Brandt, B. - Birth name of Mieller, Björn: Brandt, B. AN - OPUS4-33600 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bruno, Giovanni T1 - Getting more out of your Neutron Scattering Data: a couple of possible strategies to use neutrons as an industrial problem-solving tool T2 - VI EUROPEAN CONFERENCE ON NEUTRON SCATTERING CY - Zaragoza, Spain DA - 2015-08-30 PY - 2015 AN - OPUS4-33963 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mieller, Björn A1 - Rabe, Torsten T1 - Structuring of LTCC substrates by a combination of pressure-assisted sintering and hot-embossing N2 - A novel technology for the structuring of LTCC surfaces is introduced. The material is shaped in a zero-shrinkage process by embossing a glassy carbon mold into the softened LTCC directly after termination of the shrinkage. Three commercially available LTCC compositions (Ceramtape GC, Heratape CT707, and DP951) were tested. Diverse raised and lowered structures including rings, grids, and characters were fabricated. Different material behavior was observed for the tested compositions. Promising results were achieved with Ceramtape GC. Embossing of precise, 40 µm deep circular cavities and 50 µm high raised characters is demonstrated. Processing of 100 × 100 mm² substrates is possible. DP951 showed very good moldability, but also unwanted material displacement due to evaporating lead. A high displacement capacity but uneven heights of embossed structures were observed on CT707 samples. SEM investigations proved the precise transfer of surface contours from the mold to the LTCC. Thereby, the high potential of the hot-embossing process for micro-patterning of LTCC is illustrated. T2 - 11th International Conference and Exhibition on Ceramic Interconnects and Ceramic Microsystem Technologies (CICMT 2015) CY - Dresden, Germany DA - 20.04.2015 KW - LTCC KW - Glass-like carbon PY - 2015 DO - https://doi.org/10.4071/CICMT-THA24 SN - 2380-4491 VL - 2015 IS - CICMT SP - 000297 EP - 000303 AN - OPUS4-40135 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bruno, Giovanni T1 - Absorbtion and Refraction Techniques: Characterization and Non-Destructive Testing of Additively Manufactured Materials N2 - The combination of tomographic, microstructural data with other experimental techniques and with modeling is paramount, if we want to extract the maximum amount of information on material and component properties. In particular, quantitative image analysis, statistical approaches, direct discretization of tomographic reconstructions represent concrete possibilities to extend the power of the tomographic 3D representation to insights into the material and component performance. This logic thread holds equally for industrial and academic research, and valorizes expensive experiments such as those carried out at synchrotron sources, which cannot be daily repeated. I will show a few examples of possible use of X-ray tomographic data for quantitative assessment of damage evolution and microstructural properties, as well as for non-destructive testing. Examples of micro-structured inhomogeneous materials will be given, such as Composites, Ceramics, Concrete, and Additively manufactured parts. I will also show how X-ray refraction computed tomography (CT) can be highly complementary to classic absorption CT, being sensitive to internal interfaces. T2 - c-Kolloquium an dem FRM II Reaktor CY - Munich, Germany DA - 29.07.2016 KW - Computertomographie KW - Metrologie KW - 3D Mikrostruktur KW - Zerstörungsfreie Prüfung KW - Röntgenrefraktion KW - TF Material KW - Analytical Science PY - 2015 AN - OPUS4-38827 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Vogl, Jochen T1 - Certification of an isotope reference material (IRM) for magnesium: Determination of SI traceable isotope ratios T2 - 14th International Symposium on Biological and Environmental Reference Materials (BERM 14) CY - National Harbor, Maryland 20745 USA DA - 2015-10-11 PY - 2015 N1 - Geburtsname von Mieller, Björn: Brandt, B. - Birth name of Mieller, Björn: Brandt, B. AN - OPUS4-34483 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Cabeza, Sandra T1 - 3D Microstructure Characterization of Al MMC by means of Synchrotron Micro-Tomography at BAMline-Bessy II T2 - BESSY Users Meeting CY - Berlin, Germany DA - 2015-12-10 PY - 2015 AN - OPUS4-35129 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hodoroaba, Vasile-Dan T1 - Determination of the Collection Solid Angle of EDS Detectors T2 - EMAS 2015 - 14th European Workshop on Modern Developments and applications in microbeam analysis CY - Portoroz, Slovenia DA - 2015-05-03 PY - 2015 AN - OPUS4-33248 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -