TY - JOUR A1 - Li, L. A1 - Han, M. A1 - Nolze, Gert T1 - The determination of lattice parameters using single EBSD patterns N2 - A typical electron backscatter diffraction (EBSD) pattern usually contains more than a hundred of Kikuchi poles that formed by intersecting dozens of visible Kikuchi bands. The poles correspond to zone axes in real space or lattice planes in reciprocal space. The band widths are inversely proportional to the interplanar spacings of diffracting lattice planes, and the angle formed by the beam source and two band center-lines approximately corresponds to angle between two lattice planes. However, EBSD patterns always suffer from gnomic distortions. In addition, the band width measurement has a relative error of 5-20% due to the complex profile. Thus, an EBSD pattern always provides abundant crystallographic information but disappointingly low accuracy. T2 - Microscopy & MicroAnalysis 2016 CY - Columbus, Ohio, USA DA - 24.07.2016 KW - Electron backscatter diffraction KW - Lattice parameter determination PY - 2016 UR - https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1431927616004025 SN - 1431-9276 SN - 1435-8115 VL - 22 SP - Suppl. 3, 634 EP - 635 AN - OPUS4-37742 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Winkelmann, Aimo A1 - Nolze, Gert T1 - Orientation analysis of non-centrosymmetric crystal structures using electron backscatter diffraction N2 - Crystal structures that show a broken symmetry in their cubic and hexagonal modifications are of great relevance for optoelectronic and photonic applications. This is why methods which are sensitive to non-centrosymmetric structures are important for analysis of these materials in technological applications. T2 - 24th Annual Conference of the german Crystallographic Society CY - Stuttgart, Germany DA - 14.03.2016 KW - Electron backscatter diffraction KW - Non-centrosymmetry KW - Friedel's rule KW - Pattern matching KW - GaN KW - GaP PY - 2016 VL - 36 Supplement SP - 22 PB - Walter de Gruyter GmbH & Co KG AN - OPUS4-37743 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nolze, Gert T1 - Introduction to PowderCell N2 - The presentation give a short introduction into the free-available software PowderCell (BAM)for the simulation of X-ray diffraction patterns of polycrystalline materials. T2 - PowderCell Users meeting CY - Joinville, Brazil DA - 19.10.2015 KW - X-ray diffraction KW - Simulation KW - Structure viewer KW - Subgroup relationships PY - 2015 AN - OPUS4-37791 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nolze, Gert T1 - EBSD: more reliable and accurate N2 - The presentation discusses numerous new approaches in order to increase precision and accuracy of electrom backscatter diffraction measurements. T2 - 1st EBSD Workshop CY - Belo Horizonte, Brazil DA - 17.09.2015 KW - Orientation mapping KW - Electron backscatter diffraction KW - Lattice parameter determination KW - Orientation precision KW - Orientation noise PY - 2015 AN - OPUS4-37797 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Epishin, A. I. A1 - Petrushin, N. V. A1 - Link, T. A1 - Nolze, Gert A1 - Loshchinin, Yu. V. A1 - Gerstein, G. T1 - Thermal stability of the structure of a heat-resistant cobalt alloy hardened with intermetallic γ'-phase precipitates N2 - The thermal stability of the microstructure of a heat-resistant cobalt alloy, which consists of a γ solid solution strengthened with γ'-phase precipitates, has been studied. The temperature behavior of the dissolution of the hardening γ' phase and the kinetics of its coarsening at 700 and 800°C have been determined. It is found that, during prolonged annealing at 800°C, the γ' → β phase transformation occurs. KW - Superalloy KW - Microstructure KW - Hardening KW - Electron backscatter diffraction KW - TEM PY - 2016 DO - https://doi.org/10.1134/S0036029516040078 SN - 0036-0295 VL - 2016 IS - 4 SP - 286 EP - 291 PB - Pleiades Publishing AN - OPUS4-37768 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nolze, Gert T1 - Microstructure characterization of the Treysa meteorite N2 - Microstructure descripton of heat-affected zone, fusion crust and main metal of the Treysa iron using scanning electron microscopy, EBSD and EDS. T2 - 8. Deutsches Meteoriten Kolloquium, CY - Zella Willingshausen, Germany DA - 02.04.2016 KW - Electron backscatter diffraction KW - EDX KW - Light microscopy KW - Microstructure KW - Oxidation PY - 2016 DO - https://doi.org/10.13140/RG.2.1.3387.8161 AN - OPUS4-37769 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nolze, Gert A1 - Winkelmann, Aimo T1 - The challenge of band detection N2 - The presentation demonstrates different traps which are related to the detection of Kikuchi bands in EBSD patterns. T2 - EBSD 2015 CY - Glasgow, UK DA - 30.03.2015 KW - Electron backscatter diffraction KW - Image processing KW - Pseudo symmerty KW - Crystal lattice KW - Pyrite KW - Pattern matching KW - Misindexing PY - 2015 AN - OPUS4-37805 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vos, M. A1 - Winkelmann, Aimo A1 - Nolze, Gert T1 - Element-specific Kikuchi patterns of Rutile N2 - The kinetic energy of keV electrons backscattered from a rutile (TiO2) surface depends measurably on the mass of the scattering atom. This makes it possible to determine separately the angular distribution of electrons backscattered elastically from either Ti or O. Diffraction effects of these backscattered electrons inside the rutile crystal lead to the formation of Kikuchi patterns. The element-resolved Kikuchi patterns of Ti and O differ characteristically, but each can be described fairly well in terms of the dynamical theory of diffraction. Qualitatively, much of the differences can be understood by considering the relative arrangement of the Ti and O atoms with respect to planes defined by the crystal lattice. KW - Electron Rutherford backscattering KW - TiO2 KW - Kikuchi pattern KW - EBSD pattern KW - Simulation PY - 2015 DO - https://doi.org/10.1016/j.ultramic.2015.04.018 SN - 0304-3991 VL - 156 SP - 50 EP - 58 AN - OPUS4-37787 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nolze, Gert T1 - SEM-TKD: Signal formation, practical challenges and related applications N2 - TKD and EBSD will be compared and benefits as well as limitations of TKD will be discussed. T2 - XIV Brazilian MRS Meeting CY - Rio de Janeiro, Brazil DA - 27.09.2015 KW - TKD KW - EBSD KW - Kikuchi diffraction KW - Nanoanalytic KW - Orientation mapping PY - 2015 AN - OPUS4-37788 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nolze, Gert T1 - Simulation of powder diffraction patterns N2 - The theory of powder diffraction simulation is explained at the example of PowderCell, a free-available software of BAM. T2 - PowderCell Users meeting CY - Joinville, Brazil DA - 21.09.2015 KW - Powder diffraction KW - X-ray diffraction KW - Phase analysis KW - Simulation PY - 2015 AN - OPUS4-37789 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Nolze, Gert A1 - Payton, E. T1 - Messengers from Space: A Scanning Electron Microscopy Investigation N2 - The macro- and microstructure of iron meteorites provide valuable insights into both the inner structure of our planet and the history of our solar system. High speed collision events in the asteroid belt send the meteorites careening toward Earth. The collisions produce unique deformation microstructures. With cooling rates on the scale of a few degrees per million years, iron meteorites can consist of crystal sizes on the order of meters prior to the collision events. These extremely slow cooling rates result in phase transformations occurring at conditions near thermodynamic equilibrium. Preserving meteorite fragments is important for future studies of phase transformations, material behavior at high strain rates, and the origin of the universe. KW - Meteorite KW - Phase identification KW - Hibbingite KW - Orientation relationship KW - Electron backscatter diffraction KW - Energy dispersive x-ray spectroscopy KW - EDX PY - 2013 IS - 3 SP - 2 EP - 4 PB - GIT Verlag AN - OPUS4-37981 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Nolze, Gert T1 - Irrational orientation relationship derived from rational orientation relationships using EBSD data N2 - The determination of the orientation relationship (OR) between α-Fe matrix (bcc) and γ-Fe precipitates (fcc) is discussed using orientation data collected by electron backscatter diffraction (EBSD). The comparatively low accuracy of EBSD is compensated by the high number of measurements what allows a general statement regarding to the mean OR existing in a sample. The representation and discussion is realized on a part of the Bain zone in a {001} pole figure. A discussion of some selected rational OR which are commonly used for the phase boundary characterization between α and γ shows that the pole figures describing a transformation from γ → α are different to those for α → γ. A technique is proposed based on at least three misorientation angles between the experimental OR to the rational OR's as reference. For the misorientation angle distribution a refinement is applied to extract the mean values. They are used to detect the mean OR, what is also possible for only a few or even a single precipitate if the number of measurements describing the phase boundary is sufficiently high. KW - Orientation mapping KW - Orientation relationship KW - Electron backscatter diffraction KW - Kurdjumov-Sachs KW - Nishiyama-Wassermann KW - Misorientation PY - 2008 DO - https://doi.org/10.1002/crat.200711058 VL - 43 IS - 1 SP - 61 EP - 73 PB - WILEY-VCH AN - OPUS4-38009 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -