TY - JOUR A1 - Rodrigues, A.C.P. A1 - Österle, Werner A1 - Gradt, Thomas A1 - Azevedo, César Roberto de Farias T1 - Impact of copper nanoparticles on tribofilm formation determined by pin-on-disc tests with powder supply: Addition of artificial third body consisting of Fe3O4, Cu and graphite N2 - Copper, magnetite and graphite particles were mixed in order to observe their impact on the coefficient of friction (CoF) during pin-on-disc tests and on the tribofilm formation after testing. Pure magnetite powder provided a value of CoF of 0.4. Magnetite-copper mixtures tested at 400 °C revealed lower CoF values (~0.4) than those at room temperature (~0.6). Magnetite-graphite and magnetite-graphite-copper mixtures presented lower CoF values (~0.3). All systems formed a magnetite-based tribofilm and patches of metallic copper were found on the tribosurfaces of the mixtures containing copper. Carbon layers and graphite nanoinclusions were observed in the graphite mixtures. The incorporation of zirconia particles, a by-product of ball milling mixing, prevented the selective transfer of graphite and copper to the tribosurfaces of some of the samples. KW - Brake pad materials KW - Sliding friction KW - Transfer layer KW - Surface analysis KW - Model friction tests PY - 2017 DO - https://doi.org/10.1016/j.triboint.2017.02.014 SN - 0301-679X VL - 110 SP - 103 EP - 112 PB - Elsevier Ltd. CY - Amsterdam AN - OPUS4-40104 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinecke, E.-A. A1 - Hübert, Thomas A1 - Tkatschenko, I. A1 - Kessler, A. A1 - Kuznetsov, M. A1 - Wilkins, B. A. A1 - Hedley, D. A1 - Azkarate, I. A1 - Proust, C. A1 - Acosta-Iborra, B. A1 - Gavrikov, A. A1 - De Bruijn, P.C.J. A1 - Marangon, A. A1 - Teodorczyk, A. A1 - Grafwallner, F. T1 - Integration of experimental facilities: a joint effort for establishing a common knowledge base in experimental work on hydrogen safety T2 - 3rd International conference on hydrogen safety CY - Ajaccio, Corsica, France DA - 2009-09-16 PY - 2009 IS - ID 204 SP - 1 EP - 16 AN - OPUS4-20254 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Welzel, F. A1 - Grunewald, Thomas A1 - Beyer, M. A1 - Grätz, Rainer A1 - Klages, C.-P. T1 - Mechanisch erzeugte Reib- und Schlagfunken im Vergleich T2 - 12. Kolloquium zu Fragen der chemischen und physikalischen Sicherheitstechnik CY - Berlin, Deutschland DA - 2010-06-15 PY - 2010 SN - 978-3-9813550-1-7 SN - 0938-5533 SP - 32 EP - 36 PB - BAM Bundesanstalt für Materialforschung und -prüfung CY - Berlin AN - OPUS4-21266 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Reinecke, E.-A. A1 - Hübert, Thomas A1 - Tkatschenko, I. A1 - Kessler, A. A1 - Kuznetsov, M. A1 - Wilkins, M. A1 - Hedley, D. A1 - Azkarate, I. A1 - Proust, C. A1 - Acosta-Iborra, B. A1 - Gavrikov, B. A1 - De Bruijn, P.C.J. A1 - Marangon, A. A1 - Teodorczyk, A. A1 - Grafwallner, A. T1 - Integration of experimental facilities: a joint effort for establishing a common knowledge base in experimental work on hydrogen safety N2 - In the area of hydrogen safety, research facilities are essential for the experimental investigation of relevant phenomena, for testing devices and safety concepts, as well as for the generation of validation data for the various numerical codes and models. Within the framework of the European HySafe Network of Excellence (NoE), the 'Integration of Experimental Facilities (IEF)' activity has provided basic support for joint experimental work. Even beyond the funding period of the HySafe NoE in the 6th Framework Program, IEF represents a long-lasting effort for the sustainable integration of experimental research capacities and expertise of the partners from different research fields. In order to achieve a high standard in the quality of experimental data provided by the partners, emphasis was put on the know-how transfer between the partners. On the one hand, documentation on the experimental capacities was prepared and analyzed. On the other hand, a wiki-based communication platform was established, supported by biannual workshops covering topics ranging from measurement technologies to safety issues. Based on the partners' contributions, a working document was created on best practice including the joint experimental knowledge of all partners with regard to experimental set-ups and instrumentation. The paper gives an overview of the IEF partners and the network activities over the last five years. KW - Hydrogen safety KW - Experiments PY - 2011 DO - https://doi.org/10.1016/j.ijhydene.2010.04.162 SN - 0360-3199 VL - 36 IS - 3 SP - 2700 EP - 2710 PB - Elsevier CY - Oxford AN - OPUS4-23257 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Güttler, B. A1 - Schiel, D. A1 - Danzebrink, H. A1 - Unger, Wolfgang A1 - Gross, Thomas A1 - Lippitz, Andreas A1 - Müller, J.-P. T1 - Physical and Chemical Characterization of Thermal and Native Siliconoxide layers on Silicon T2 - Symposium "Reference Materials for Technologies in the New Millenium" CY - Berlin, BAM, Germany DA - 2000-05-22 PY - 2000 SP - 1(?) EP - 7(?) AN - OPUS4-6924 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Stadthaus, Meinhard A1 - Thomas, Hans-Martin A1 - Migoun, N.P. A1 - Gnusin, A.B. A1 - Baugatz, J. A1 - König, W. T1 - Sensitivity of penetrant and magnetic particle testing - Performance testing of detection media for penetrant and magnetic particle testing (PT and MT) N2 - Die Empfindlichkeit von Eindring- und Magnetpulverprüfungen (PT, MT) hängt unter anderem von der Eignung und der Qualität der Prüfmittel ab (für PT bezeichnet als Eindringsystem). Die Ermittlung der Empfindlichkeit erfolgt an Kontrollkörpern mit natürlichen und künstlichen Inhomogenitäten durch Ermittlung der Anzeigenerkennbarkeit als Maß für die Eignung. Die europäischen Normen spezifizieren die Anforderungen an die Prüfmittel für Typen-, Chargen- und Betriebsprüfungen nach pr EN ISO 3452-2 für PT und EN ISO 9934-2 für MT. Dieser Beitrag beschreibt die Ermittlung der Empfindlichkeit von Prüfmitteln sowie deren Qualifizierung bei der Typenprüfung. Die vorgeschlagenen Verfahren wurden durch experimentelle Untersuchungen validiert, bei denen ein Bildverarbeitungssystem zur Ermittlung der Anzeigenerkennbarkeit verwendet wurde. Im Hinblick auf die Qualifizierung der Prüfmittel wird die Zuverlässigkeit der Verfahren diskutiert. PY - 2004 DO - https://doi.org/10.3139/120.100591 SN - 0025-5300 VL - 46 IS - 6 SP - 320 EP - 326 PB - Carl Hanser Verlag CY - München AN - OPUS4-3574 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Witke, Klaus A1 - Klaffke, Dieter A1 - Schneider, Thomas A1 - Schreckenbach, J.P. T1 - Laser-damaging as a useful tool for materials characterization by Raman microscopy KW - Raman-Mikroskopie KW - Raman-Laser KW - Laserstrahlbearbeitung PY - 1999 SN - 0169-4332 SN - 1873-5584 VL - 151 IS - 1-2 SP - 33 EP - 39 PB - North-Holland CY - Amsterdam AN - OPUS4-709 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Liu, Cong A1 - Hellemans, Simon A1 - Kinjo, Yukihiro A1 - Mikhailova, Alina A A1 - Aumont, Cédric A1 - Weng, Yi-Ming A1 - Buček, Aleš A1 - Husnik, Filip A1 - Šobotník, Jan A1 - Harrison, Mark C A1 - McMahon, Dino P A1 - Bourguignon, Thomas T1 - Recurrent horizontal gene transfers across diverse termite genomes N2 - Horizontal gene transfer (HGT), the transmission of genetic material across species, is an important innovation source in prokaryotes. In contrast, its significance is unclear in many eukaryotes, including insects. Here, we used high-quality genomes of 45 termites and two cockroaches to investigate HGTs from non-metazoan organisms across blattodean genomes. We identified 289 genes and 2,494 pseudogenes classified into 168 orthologous groups originating from an estimated 281 HGT events. Wolbachia represented the primary HGT source, while termite gut bacteria and the cockroach endosymbiont Blattabacterium did not contribute meaningfully to HGTs. Most horizontally acquired genes descended from recent and species-specific HGTs, experienced frequent duplications and pseudogenizations, and accumulated substitutions faster than synonymous sites of native protein-coding genes. Genes frequently transferred horizontally to termite genomes included mobile genetic elements and genetic information processing genes. Our results indicate that termites continuously acquired genes through HGT, and that most horizontally acquired genes are specific to restricted lineages. Overall, genes acquired by HGT by termites and cockroaches seemed generally non-functional and bound to be lost. KW - Phylogenomics KW - Isoptera KW - Comparative genomics PY - 2026 DO - https://doi.org/10.1093/evolut/qpag003 SN - 0014-3820 SP - 1 EP - 14 PB - Oxford University Press (OUP) AN - OPUS4-65418 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -