TY - GEN A1 - Weiß, Sabine A1 - Meißner, A. A1 - Guillardeau, A. A1 - Dudzinski, Wlodzimierz A1 - Fischer, A. T1 - Characterisation of microstructure and microtexture of coronary artery stents after fatigue deformation T2 - Fatigue 2006, Proceedings 9th International Fatigue Congress May 14-19, 2006 Atlanta Y1 - 2006 PB - Georgia Institute of Technology CY - Atlanta, Ga. ER - TY - CHAP A1 - Weiß, Sabine A1 - Dudzinski, Wlodzimierz A1 - Tikhovskiy, I. T1 - TEM Observation of Deformation Structures in High Nitrogen Steel T2 - Proceedings of the 7th International Conference on High Nitrogen Steels, Ostend, Belgium, September 19 - 22, 2004 Y1 - 2004 SN - 3-937057-09-9 SP - 225 EP - 228 PB - GRIPS-Media GmbH CY - Bad Harzburg ER - TY - GEN A1 - Obrosov, Aleksei A1 - Gulyaev, Roman A1 - Zak, Andrzej A1 - Ratzke, Markus A1 - Naveed, Muhammad A1 - Dudzinski, Wlodzimierz A1 - Weiß, Sabine T1 - Chemical and Morphological Characterization of Magnetron Sputtered at Different Bias Voltages Cr-Al-C Coatings T2 - Materials N2 - MAX phases (M = transition metal, A = A-group element, and X = C/N) are of special interest because they possess a unique combination of the advantages of both metals and ceramics. Most attention is attracted to the ternary carbide Cr2AlC because of its excellent high-temperature oxidation, as well as hot corrosion resistance. Despite lots of publications, up to now the influence of bias voltage on the chemical bonding structure, surface morphology, and mechanical properties of the film is still not well understood. In the current study, Cr-Al-C films were deposited on silicon wafers (100) and Inconel 718 super alloy by dc magnetron sputtering with different substrate bias voltages and investigated using Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), Atomic Force Microscopy (AFM), and nanoindentation. Transmission Electron Microscopy (TEM) was used to analyze the correlation between the growth of the films and the coating microstructure. The XPS results confirm the presence of Cr2AlC MAX phase due to a negative shift of 0.6–0.9 eV of the Al2p to pure aluminum carbide peak. The XRD results reveal the presence of Cr2AlC MAX Phase and carbide phases, as well as intermetallic AlCr2. The film thickness decreases from 8.95 to 6.98 µm with increasing bias voltage. The coatings deposited at 90 V exhibit the lowest roughness (33 nm) and granular size (76 nm) combined with the highest hardness (15.9 GPa). The ratio of Al carbide to carbide-like carbon state changes from 0.12 to 0.22 and correlates with the mechanical properties of the coatings. TEM confirms the columnar structure, with a nanocrystalline substructure, of the films. KW - XPS KW - AFM KW - MAX phase KW - TEM KW - chemical bonding KW - surface morphology Y1 - 2017 UR - http://www.mdpi.com/1996-1944/10/2/156/htm U6 - https://doi.org/10.3390/ma10020156 SN - 1996-1944 VL - 10 IS - 2 SP - 156 ER - TY - GEN A1 - Naveed, Muhammad A1 - Obrosov, Aleksei A1 - Zak, Andrzej A1 - Dudzinski, Wlodzimierz A1 - Volinsky, Alex A. A1 - Weiß, Sabine T1 - Sputtering Power Effects on Growth and Mechanical Properties of Cr2AlC MAX Phase Coatings T2 - Metals N2 - Coating growth and mechanical properties of nanolamellar Cr2AlC coatings at various sputtering power were investigated in the present study. Cr2AlC coating was deposited on the IN 718 superalloy and (100) Si wafers by DC magnetron sputtering at different sputtering powers. The structure and properties were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nanoindentation. It was found that coatings had columnar structure with nanocrystalline substructure. Deposition rate increased with the sputtering power. XRD results showed the presence of the Cr2AlC MAX phase, intermetallic AlCr2 and Cr7C3 carbide phases, along with the change in preferential coating growth orientation. TEM observations confirmed the occurrence of these phases, and the SAED patterns demonstrated significant texture of the coatings. Hardness values were measured in the range between 11–14 GPa, showing a slight increase with the sputtering power. KW - MAX Phase KW - Cr2AlC KW - TEM Y1 - 2016 U6 - https://doi.org/10.3390/met6110265 SN - 2075-4701 VL - 6 IS - 11 SP - 265 ER - TY - CHAP A1 - Weiß, Sabine A1 - Gleising, B. A1 - Schremmer, S. A1 - Dudzinski, Wlodzimierz T1 - Charakterisierung der Mikrostruktur von Kobalt-Chrom-Molybdän Drähten T2 - Fortschritte in der Metallographie, Vortragstexte der 39. Metallographie-Tagung, 14. - 16. September 2005 in Erlangen Y1 - 2005 SP - 207 EP - 212 PB - Werkstoff-Informationsgesellschaft CY - Frankfurt ER - TY - CHAP A1 - Weiß, Sabine A1 - Gleising, B. A1 - Dudzinski, Wlodzimierz T1 - Mikrostruktur- und Mikrotextur-Charakterisierung nach der Verformung des hochstickstoffhaltigen Edelstahls (1.4452) T2 - Fortschritte in der Metallographie, Vortragstexte der 38. Metallographie-Tagung, 29. September - 1. Oktober 2004 in Bochum Y1 - 2004 SN - 3-88355-336-0 SP - 103 EP - 108 PB - Werkstoff-Informationsgesellschaft CY - Frankfurt ER - TY - GEN A1 - Weiß, Sabine A1 - Mattissen, D. A1 - Dudzinski, Wlodzimierz A1 - Fischer, A. T1 - Microstructure of the Laser Beam Welded Iron-Based Superalloy A286 after High Temperature Creep T2 - Conference Proceedings of the Materials Week, Munich 2002 Y1 - 2002 SN - 3-88355-314-X SN - 978-3-8835-5314-6 SP - S. 142 PB - Werkstoff-Informationsgesellschaft CY - Frankfurt ER -