EBSD Basics: Applications and Data Analysis

This lecture covers the basics of Electron Backscatter Diffraction (EBSD), including sample preparation, acquisition of EBSD patterns, Hough transform, and data analysis techniques. It explores the uses of EBSD for orientation measurements, phase identification, and quantitative microstructural data in various materials. The lecture also delves into the influence of accelerating voltage, spatial and angular accuracy, and applications of EBSD in crystallography. Practical aspects such as indexing of EBSPs, phase identification, and data analysis with orientation representations are discussed in detail.

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Related lectures (13)

Related concepts (29)

Electron backscatter diffraction

Electron backscatter diffraction (EBSD) is a scanning electron microscopy (SEM) technique used to study the crystallographic structure of materials. EBSD is carried out in a scanning electron microscope equipped with an EBSD detector comprising at least a phosphorescent screen, a compact lens and a low-light camera. In this configuration, the SEM incident beam hits the tilted sample. As backscattered electrons leave the sample, they interact with the crystal's periodic atomic lattice planes and diffract according to Bragg's law at various scattering angles before reaching the phosphor screen forming Kikuchi patterns (EBSPs).

Crystallography

Crystallography is the experimental science of determining the arrangement of atoms in crystalline solids. Crystallography is a fundamental subject in the fields of materials science and solid-state physics (condensed matter physics). The word crystallography is derived from the Ancient Greek word κρύσταλλος (; "clear ice, rock-crystal"), with its meaning extending to all solids with some degree of transparency, and γράφειν (; "to write").

Electron diffraction

Electron diffraction refers to changes in the direction of electron beams due to interactions with atoms. Close to the atoms the changes are described as Fresnel diffraction; far away they are called Fraunhofer diffraction. The resulting map of the directions of the electrons far from the sample (Fraunhofer diffraction) is called a diffraction pattern, see for instance Figure 1. These patterns are similar to x-ray and neutron diffraction patterns, and are used to study the atomic structure of gases, liquids, surfaces and bulk solids.

X-ray crystallography

X-ray crystallography is the experimental science determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to diffract into many specific directions. By measuring the angles and intensities of these diffracted beams, a crystallographer can produce a three-dimensional picture of the density of electrons within the crystal. From this electron density, the mean positions of the atoms in the crystal can be determined, as well as their chemical bonds, their crystallographic disorder, and various other information.

Scanning electron microscope

A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons. The electrons interact with atoms in the sample, producing various signals that contain information about the surface topography and composition of the sample. The electron beam is scanned in a raster scan pattern, and the position of the beam is combined with the intensity of the detected signal to produce an image.

Deviation from Bragg scattering

Covers electron diffraction theory, Bragg's law, reciprocal lattice, Ewald sphere, and weak-beam dark-field imaging.

Electron Diffraction: Basics & Applications MSE-352: Introduction to microscopy + Laboratory work

Explores electron diffraction fundamentals, crystal symmetry, and advanced techniques for materials analysis.

Electron Diffraction: Basics & Applications MSE-352: Introduction to microscopy + Laboratory work

Explores electron diffraction basics, including Bragg's law, reciprocal lattice, and applications like crystal phase discrimination.

Electron Diffraction: Basics & Applications MSE-352: Introduction to microscopy + Laboratory work

Covers the basics of electron diffraction, explaining contrast in TEM images and its applications in material analysis.

X-rays: From Discovery to Applications CH-417: Optical methods in chemistry

Explores the historical perspective, properties, and applications of X-rays, including diffraction, atomic resolution, and spectral colors of elements.