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- Electron_backscatter_diffraction abstract "Electron backscatter diffraction (EBSD) is a microstructural-crystallographic characterisation technique to study any crystalline or polycrystalline material. The technique involves understanding the structure, crystal orientation and phase of materials in the Scanning Electron Microscope (SEM). Typically it is used to explore microstructures, revealing texture, defects, grain morphology and deformation. It can be combined with complementary techniques within the SEM for phase discrimination. Traditionally these types of studies have been carried out using X-ray diffraction (XRD), neutron diffraction and/or electron diffraction in a TEM.Experimentally EBSD is conducted using a SEM equipped with an EBSD detector containing at least a phosphor screen, compact lens and low light CCD camera. Commercially available EBSD systems typically come with one of two different CCD cameras: for fast measurements the CCD chip has a native resolution of 640×480 pixels; for slower, and more sensitive measurements, the CCD chip resolution can go up to 1600×1200 pixels. The biggest advantage of the high-resolution detectors is their higher sensitivity and therefore the information within each diffraction pattern can be analysed in more detail. For texture and orientation measurements, the diffraction patterns are binned in order to reduce their size and reduce computational times. Modern EBSD systems can index patterns at up to 1800 patterns / second. This enables very rapid and rich microstructural maps to be generated.For an EBSD measurement a flat/polished crystalline specimen is placed in the SEM chamber at a highly tilted angle (~70° from horizontal) towards the diffraction camera, to increase the contrast in the resultant electron backscatter diffraction pattern. The phosphor screen is located within the specimen chamber of the SEM at an angle off approximately 90° to the pole piece and is coupled to a compact lens which focuses the image from the phosphor screen onto the CCD camera. In this configuration, some of the electrons which enter the sample backscatter and may escape. As these electrons leave the sample, they may exit at the Bragg condition related to the spacing of the periodic atomic lattice planes of the crystalline structure and diffract. These diffracted electrons can escape the material and some will collide and excite the phosphor causing it to fluoresce.Inside the SEM, the electron beam is focussed onto the surface of a crystalline sample. The electrons enter the sample and some may backscatter. Escaping electrons may exit near to the Bragg angle and diffract to form Kikuchi bands which correspond to each of the lattice diffracting crystal planes. If the system geometry is well described, it is possible to relate the bands present in the diffraction pattern to the underlying crystal phase and orientation of the material within the electron interaction volume. Each band can be indexed individually by the Miller indices of the diffracting plane which formed it. In most materials, only three bands/planes which intercept are required to describe a unique solution to the crystal orientation (based upon their interplanar angles) and most commercial systems use look up tables with international crystal data bases to perform indexing. This crystal orientation relates the orientation of each sampled point to a reference crystal orientation.While this 'geometric' description related to the kinematic solution (using the Bragg condition) is very powerful and useful for orientation and texture analysis, it only describes the geometry of the crystalline lattice and ignores many physical processes involved within the diffracting material. To adequately describe finer features within the EBSP, one must use a many beam dynamical model (e.g. the variation in band intensities in an experimental pattern does not fit the kinematic solution related to the structure factor).".
- Electron_backscatter_diffraction thumbnail Ebsd.jpg?width=300.
- Electron_backscatter_diffraction wikiPageID "1678541".
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- Electron_backscatter_diffraction wikiPageOutDegree "41".
- Electron_backscatter_diffraction wikiPageRevisionID "666387821".
- Electron_backscatter_diffraction wikiPageWikiLink Animal_shell.
- Electron_backscatter_diffraction wikiPageWikiLink Aragonite.
- Electron_backscatter_diffraction wikiPageWikiLink Atom.
- Electron_backscatter_diffraction wikiPageWikiLink Bragg_diffraction.
- Electron_backscatter_diffraction wikiPageWikiLink Braggs_law.
- Electron_backscatter_diffraction wikiPageWikiLink Calcite.
- Electron_backscatter_diffraction wikiPageWikiLink Calcium_carbonate.
- Electron_backscatter_diffraction wikiPageWikiLink Category:Diffraction.
- Electron_backscatter_diffraction wikiPageWikiLink Category:Scientific_techniques.
- Electron_backscatter_diffraction wikiPageWikiLink Category:Spectroscopy.
- Electron_backscatter_diffraction wikiPageWikiLink Cathodoluminescence.
- Electron_backscatter_diffraction wikiPageWikiLink Crystal_structure.
- Electron_backscatter_diffraction wikiPageWikiLink Crystalline.
- Electron_backscatter_diffraction wikiPageWikiLink Crystallinity.
- Electron_backscatter_diffraction wikiPageWikiLink Crystallography.
- Electron_backscatter_diffraction wikiPageWikiLink Diffraction.
- Electron_backscatter_diffraction wikiPageWikiLink Electron_crystallography.
- Electron_backscatter_diffraction wikiPageWikiLink Electron_diffraction.
- Electron_backscatter_diffraction wikiPageWikiLink Energy-dispersive_X-ray_spectroscopy.
- Electron_backscatter_diffraction wikiPageWikiLink Energy_dispersive_X-ray_spectroscopy.
- Electron_backscatter_diffraction wikiPageWikiLink Exoskeleton.
- Electron_backscatter_diffraction wikiPageWikiLink Fluorescence.
- Electron_backscatter_diffraction wikiPageWikiLink Hough_transform.
- Electron_backscatter_diffraction wikiPageWikiLink Kikuchi_band.
- Electron_backscatter_diffraction wikiPageWikiLink Kikuchi_line.
- Electron_backscatter_diffraction wikiPageWikiLink Limestone.
- Electron_backscatter_diffraction wikiPageWikiLink Micrometre.
- Electron_backscatter_diffraction wikiPageWikiLink Miller_index.
- Electron_backscatter_diffraction wikiPageWikiLink Misorientation.
- Electron_backscatter_diffraction wikiPageWikiLink Nanometers.
- Electron_backscatter_diffraction wikiPageWikiLink Nanometre.
- Electron_backscatter_diffraction wikiPageWikiLink Neutron_diffraction.
- Electron_backscatter_diffraction wikiPageWikiLink Phase_(matter).
- Electron_backscatter_diffraction wikiPageWikiLink Phosphor.
- Electron_backscatter_diffraction wikiPageWikiLink Scanning_Electron_Microscope.
- Electron_backscatter_diffraction wikiPageWikiLink Scanning_electron_microscope.
- Electron_backscatter_diffraction wikiPageWikiLink Structure_factor.
- Electron_backscatter_diffraction wikiPageWikiLink Texture_(crystalline).
- Electron_backscatter_diffraction wikiPageWikiLink Transmission_electron_microscopy.
- Electron_backscatter_diffraction wikiPageWikiLink Wavelength-dispersive_X-ray_spectroscopy.
- Electron_backscatter_diffraction wikiPageWikiLink Wavelength_dispersive_X-ray_spectroscopy.
- Electron_backscatter_diffraction wikiPageWikiLink X-ray_crystallography.
- Electron_backscatter_diffraction wikiPageWikiLink X-ray_diffraction.
- Electron_backscatter_diffraction wikiPageWikiLink File:EBSD_Si.png.
- Electron_backscatter_diffraction wikiPageWikiLink File:EBSD_in_process.png.
- Electron_backscatter_diffraction wikiPageWikiLink File:Ebsd.jpg.
- Electron_backscatter_diffraction wikiPageWikiLink File:Sample_after_EBSD.jpg.
- Electron_backscatter_diffraction wikiPageWikiLinkText "EBSD".
- Electron_backscatter_diffraction wikiPageWikiLinkText "Electron backscatter diffraction".
- Electron_backscatter_diffraction wikiPageWikiLinkText "electron backscatter diffraction".
- Electron_backscatter_diffraction hasPhotoCollection Electron_backscatter_diffraction.
- Electron_backscatter_diffraction wikiPageUsesTemplate Template:By_whom%3F.
- Electron_backscatter_diffraction wikiPageUsesTemplate Template:Unreferenced.
- Electron_backscatter_diffraction subject Category:Diffraction.
- Electron_backscatter_diffraction subject Category:Scientific_techniques.
- Electron_backscatter_diffraction subject Category:Spectroscopy.
- Electron_backscatter_diffraction hypernym Technique.
- Electron_backscatter_diffraction type Software.
- Electron_backscatter_diffraction type Mechanic.
- Electron_backscatter_diffraction type Physic.
- Electron_backscatter_diffraction type Technique.
- Electron_backscatter_diffraction comment "Electron backscatter diffraction (EBSD) is a microstructural-crystallographic characterisation technique to study any crystalline or polycrystalline material. The technique involves understanding the structure, crystal orientation and phase of materials in the Scanning Electron Microscope (SEM). Typically it is used to explore microstructures, revealing texture, defects, grain morphology and deformation. It can be combined with complementary techniques within the SEM for phase discrimination.".
- Electron_backscatter_diffraction label "Electron backscatter diffraction".
- Electron_backscatter_diffraction sameAs Electron_Backscatter_Diffraction.
- Electron_backscatter_diffraction sameAs Difracción_de_electrones_por_retrodispersión.
- Electron_backscatter_diffraction sameAs Diffraction_dxc3xa9lectrons_rxc3xa9trodiffusxc3xa9s.
- Electron_backscatter_diffraction sameAs Diffrazione_da_retrodiffusione_elettronica.
- Electron_backscatter_diffraction sameAs m.05mr48.
- Electron_backscatter_diffraction sameAs Дифракция_отражённых_электронов.
- Electron_backscatter_diffraction sameAs Q1326017.
- Electron_backscatter_diffraction sameAs Q1326017.
- Electron_backscatter_diffraction wasDerivedFrom Electron_backscatter_diffraction?oldid=666387821.
- Electron_backscatter_diffraction depiction Ebsd.jpg.
- Electron_backscatter_diffraction isPrimaryTopicOf Electron_backscatter_diffraction.