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Electron Backscatter Diffraction (EBSD)

Electron backscattered diffraction (EBSD), is a microstructural-crystallographic technique used to examine the crystallographic orientation of many materials, which can be used to elucidate texture or preferred orientation of any crystalline or polycrystalline material.

cogsHow does it work?

A electron backscatter diffraction pattern is formed when many different planes diffract different electrons to form kikuchi bands which correspond to each of the lattice diffracting planes.

If the system geometry is well described, it is possible to relate the bands present in the EBSD 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.

Applications:

Index and identify the seven crystal systems; crystal orientation mapping; defect studies; phase identification; grain boundary and morphology studies; regional heterogeneity investigations; material discrimination; microstrain mapping.

Complementary Techniques:

XRD, TEM (Electron Diffraction).

Warwick capability:

EDAX EBSD.

Contact:

Dr Ian Hancox, 024 76 150380 email i dot hancox at warwick dot ac dot uk.

EBSD Equipment

Typical results format, and sample:

EBSD sampleEBSD Spectrum ii

Status
Availability

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Warwick collect/analyse data

Warwick collect data
 
Available to user with expertise/ contribution
 
Spare capacity for collaborative research
 

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