TY - CHAP A1 - Lu, Z. A1 - Becker, S. A1 - Leinitz, Sarah A1 - von Klitzing, R. A1 - Schmidt, Wolfram A1 - Stephan, D. ED - Mechtcherine, V. ED - Khayat, K. ED - Secrieru, E. T1 - Rheological properties of silica beads in the presence of different polymers and electrolyte N2 - Properties of interstitial liquid phase in cement paste, including the species and concentrations of polymers and ion etc., play an important role for the rheological properties of cementitious materials. In order to better understand their effect, an inert model substance, spherical silica beads (SBs) with defined surface and granulometry were used in the presence of electrolytes (CaCl2) and/or different polymers, including polycarboxylate superplasticizer (PCE) and polyethylene glycol (PEG). It was found the presence of Ca2+ greatly increases the viscosity and yield stress of silica beads paste (SBP), which is proportional to the [Ca2+]. For the effect of PCE, the addition of PCE is beneficial to the flowability of SBP, but a high dosage of PCE leads to a reversal effect. Furthermore, the yield stress firstly increases and then decreases with increasing [Ca2+] under the same dosage of PCE. The addition of PEG always increases the yield stress of SBP, regardless of the ion concentration and the presence or not of PCE. KW - Rheological properties KW - Ions KW - Superplasticizer KW - Silica beads PY - 2019 SN - 978-3-030-22565-0 SN - 978-3-030-22566-7 DO - https://doi.org/10.1007/978-3-030-22566-7_72 SN - 2211-0844 VL - 23 SP - 619 EP - 627 PB - Springer ET - 1 AN - OPUS4-49185 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF ED - Schmidt, Wolfram T1 - ISEE Africa - Innovation, Science, Engineering, Education N2 - Innovation, science and engineering are driving forces to mastering the global challenges of the next decades. The basis is education. ISEE stands for Innovation, Science, Engineering and education. This book summarises the presentations, discussions and Statements that were made during the ISEE-Africa conference held in Nairobi in 2019 from January 30 to February 1. The ISEE conference is a gathering of international researchers, scholars, and students, who came together to discuss jointly relevant topics related to better education for the engineers and architects of the future. Today, we know that the climate change is real. Many regions in the world are already suffering significantly, and the only way for humanity to overcome the challenges is to develop more sustainable technologies to the benefit of the entire global society. However, sustainable technologies require for deeper understanding, more conscious thinking, and smarter engineering. The only way how this can be achieved is to educate the developers, the decision makers, the engineers of tomorrow in a more knowledge driven way, and to equip them with the assertiveness required for the implementation. In this book, topics of construction and sustainable materials are linked to educational challenges. It addresses teachers, academic and political decision makers, and change drivers. The specific objective is to be critical, thought-provoking and inspiring. This way, we do hope that the book can deliver credible solution strategies for enhanced education for a new generation of decision makers with higher awareness of global and environmental challenges as well as innovation potentials. T2 - ISEE Africa - Innovation, Science, Engineering, Education CY - Nairobi, Kenya DA - 30.01.2019 KW - Innovation KW - Science KW - Engineering KW - Materials KW - Environment KW - Sustainability KW - Africa PY - 2019 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-484826 UR - http://isee-africa.com/wp-content/uploads/2019/07/Innovation-Science-Engineering-Education_High-Quality.pdf SN - 978-3-9818564-2-2 SP - 1 EP - 219 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-48482 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph T1 - Material qualification in saline, copper containing geothermal water N2 - By exposure and electrochemical tests in the laboratory the Cu-effect on corrosion behavior of carbon steel, high-alloyed steels and Ti-alloy can be assessed. Critical materials specific properties were determined by static exposure and electrochemical tests in an artificial geothermal water with high salinity and low pH, containing Cu. Conclusions were drawn using characteristic potential values. It could be shown that significant Cu-deposition and -precipitation only occurred in combination with carbon steel. High-alloyed materials (S31603, S31653, S31700, S31703, S31803 and N08904) prevent the disturbing Cu-agglomeration. Therefore, they are suitable to be chosen for future design of the piping system, either in massive or in cladded form, if formation of crevices with non-metallic materials can be excluded. From the interactions and pitting corrosion point of view, R50400 seems to be most favorable. T2 - NACE International Corrosion Conference 2019 CY - Nashville, TN, USA DA - 24.03.2019 KW - copper KW - corrosion KW - geothermal energy KW - steel PY - 2019 AN - OPUS4-47912 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Beck, Joana T1 - Book review: Handbook of material weathering (6th edition) N2 - With its almost 1000 pages and 1.7 kg this handbook feels like holding the holy bible for users of weathering techniques as well as for technicians, engineers and scientist planning to test polymeric products behavior in natural or artificial environments. KW - Corrosion KW - Testing PY - 2019 DO - https://doi.org/10.1002/maco.201970014 SN - 0947-5117 VL - 70 IS - 1 SP - 170 EP - 171 PB - Wiley-VCH CY - Weinheim AN - OPUS4-47149 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bäßler, Ralph A1 - Stoljarova, A. A1 - Regenspurg, S. T1 - Material qualification in Saline, copper containing geothermal water N2 - By exposure and electrochemical tests in the laboratory the Cu-effect on corrosion behavior of carbon steel, high-alloyed steels and Ti-alloy can be assessed. Critical materials specific properties were determined by static exposure and electrochemical tests in an artificial geothermal water with high salinity and low pH, containing Cu. Conclusions were drawn using characteristic potential values. It could be shown that significant Cu-deposition and -precipitation only occurred in combination with carbon steel. High-alloyed materials (S31603, S31653, S31700, S31703, S31803 and N08904) prevent the disturbing Cu-agglomeration. Therefore, they are suitable to be chosen for future design of the piping system, either in massive or in cladded form, if formation of crevices with non-metallic materials can be excluded. From the interactions and pitting corrosion point of view, R50400 seems to be most favorable. T2 - NACE International Corrosion Conference 2019 CY - Nashville, TN, USA DA - 24.03.2019 KW - Copper KW - Corrosion KW - Steel KW - Geothermal energy PY - 2019 SP - 1 EP - 11 PB - NACE International CY - Houston AN - OPUS4-47911 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zocca, Andrea T1 - Additive Manufacturing of Ceramic Materials N2 - Powder bed -based technologies are amongst the most successful Additive Manufacturing (AM) techniques. "Selective laser sintering/melting" (SLS/SLM) and "binder jetting 3D printing" (3DP) especially are leading AM technologies for metals and polymers, thanks to their high productivity and scalability. In this context, the "layerwise slurry deposition" (LSD) has been developed as a layer deposition method which enables the use of SLS/SLM and 3DP technologies for advanced ceramic materials. LSD consists in the layer-by-layer deposition of a ceramic slurry by means of a doctor blade. Each layer is deposited and dried to achieve a highly packed powder layer, which can be used for SLM or for 3DP. This technique offers high flexibility in the ceramic feedstock used, especially concerning material and particle size, and is capable of producing parts with physical and mechanical properties comparable to traditionally shaped parts. In this presentation, the LSD technique will be introduced and several examples of application to porcelain, SiC and alumina products will be reported. T2 - First Sino-German Workshop on 3D Printing in Space CY - Beijin, China DA - 20.02.2019 KW - Additive Manufacturing KW - Ceramic KW - Layerwise PY - 2019 AN - OPUS4-47868 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zocca, Andrea T1 - Layerwise Slurry Deposition for the Additive Manufacturing of Ceramics N2 - In powder bed Additive Manufacturing (AM) technologies, a part is produced by depositing and piling up thin powder layers. In each layer, the cross section of the object to build is defined by locally consolidating the powder, by sintering/melting the material (powder bed fusion technologies) or by ink jetting a binder (binder jetting technologies). These are already leading AM technologies for metals and polymers, thanks to their high productivity and scalability. The application of these techniques to most ceramics has been challenging so far, because of the challenges related to the deposition of homogeneous powder layers when using fine powders. In this context, the "layerwise slurry deposition" (LSD) has been developed as a layer deposition method which enables the use of SLS/SLM and 3DP technologies for advanced ceramic materials. LSD consists in the layer-by-layer deposition of a ceramic slurry by means of a doctor blade. Each layer is deposited and dried to achieve a highly packed powder layer. The LSD offers high flexibility in the ceramic feedstock used, especially concerning material and particle size, and enables the production of parts with physical and mechanical properties comparable to pressed or slip-casted parts. In this presentation, the LSD technique will be introduced and several examples of application to porcelain, SiC and alumina products will be reported. T2 - ICACC 2019 - 43rd International Conference and Exposition on Advanced Ceramics and Composites CY - Daytona Beach, FL, USA DA - 27.01.2019 KW - Additive Manufacturing KW - Ceramic KW - Layerwise KW - Slurry PY - 2019 AN - OPUS4-47865 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Bäßler, Ralph T1 - Book review: Conjugated polymers - Perspective, theory, and new materials N2 - In this also completely rewritten and reorganized second part of the two‐volume set 45 international experts comprise the current knowledge of conjugated polymers. In addition to part one on properties, processing characterization and morphology, 16 chapters cover perspectives, theory and new materials. Finally, it can be concluded that this 4th edition of this handbook fulfills, like the first part, its intention, to be the definitive resource on the topic of conducting polymers. This is assured by the updated and added contributions of all authors, which consider the significant developments both in fundamental understanding, progress and applications since publication of the previous edition. So, it can be recommended to everyone, who wants to get a comprehensive overview on conjugated polymers, not just to researchers, advanced students, and industry professionals working in materials science and engineering. KW - Polymer KW - Testing PY - 2019 DO - https://doi.org/10.1002/maco.201970094 SN - 1521-4176 SN - 0947-5117 VL - 70 IS - 9 SP - 1727 PB - WILEY‐VCH Verlag GmbH & Co. KGaA CY - Weinheim AN - OPUS4-48886 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Bäßler, Ralph T1 - Book review: Advanced ceramic and metallic coating and thin film materials for energy and environmental applications N2 - This book provides a state‐of‐the‐art overview on the processing, characterization, and modelling of metallic and ceramic materials used for energy and environmental applications. 17 scientists show a collection of current knowledge in 8 chapters. This book fulfills its intention to provide a reference book containing a collection of publications on thin films and coatings made of ceramic and metals used for energy and environmental applications. It covers a broad range of this topic and provides a comprehensive insight. Graduate and undergraduate students of materials science and mechanical engineering can find an overview on this topic to step in this interesting field of engineering. KW - Ceramic KW - Coating KW - Thin film KW - Energy PY - 2019 DO - https://doi.org/10.1002/maco.201970034 SN - 0947-5117 SN - 1521-4176 VL - 70 IS - 03 SP - 567 EP - 568 PB - WILEY-VCH Verlag GmbH & Co. KGaA CY - Weinheim AN - OPUS4-47517 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gollwitzer, Christian T1 - Synchrotron based absorption edge tomography for the analysis of 3D printed polymer MOF N2 - Absorption edge tomography is a method which exploits the sudden change of the attenuation coefficient, when the photon energy crosses the absorption edge of an element. The beamline BAM line at BESSY II, which is operated by the Federal Institute for Materials Research and Testing, can provide a monochromatized beam in a photon energy range from 5 keV up to 80 keV with a bandwidth of 2%. Together with the microtomography setup, this enables differential tomography sensitive to any element with N >= 24 (Cr) by using an appropriate K- or L-edge in this range. Here, a polymer filament embedding metal organic framework (MOF) was prepared and used for 3D printing. Absorption edge tomography at the copper K edge was employed to perform a non-destructive 3D characterization of the microstructure of the embedded MOF. Data fusion was then used to determine the size distribution of the embedded MOF. T2 - iCT 2019 CY - Padua, Italy DA - 12.02.2019 KW - Synchrotron tomography KW - BAMline KW - MOF KW - Absorption edge tomography PY - 2019 AN - OPUS4-47392 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -