EBSDmenetelmällä

EBSDmenetelmällä refers to the analysis of crystallographic information using Electron Backscatter Diffraction (EBSD). EBSD is a scanning electron microscope (SEM) based technique used to determine the crystallographic orientation of a material. It relies on the diffraction of electrons, which are scattered from the crystal lattice of the sample. When a beam of electrons strikes a crystalline sample, electrons are elastically scattered in specific directions dictated by Bragg's law. These scattered electrons form a diffraction pattern, known as a Kikuchi pattern, on a phosphor screen.

The EBSDmenetelmällä involves preparing a sample surface to be highly polished and tilted within the SEM. The electron beam interacts with the surface, and the diffracted electrons are captured by a detector. Software then analyzes the Kikuchi patterns to determine the crystallographic orientation at each scanned point. This allows for the creation of orientation maps, which visualize the texture and microstructure of the material. Key information that can be obtained includes grain size, grain orientation, phase identification, and the presence and nature of grain boundaries. The EBSDmenetelmällä is widely used in materials science and engineering for research and quality control, providing insights into mechanical properties, deformation mechanisms, and processing effects. It is particularly valuable for studying fine-grained materials and interfaces.