Neutron Scattering from Defects in Materials

  • Roger J. Stewart
Part of the NATO ASI Series book series (NSSB)

Abstract

The importance of neutron scattering in the study of defects in materials is that provides structural information about inhomogeneities ranging in scale from a few Angstoma up to defect regions with dimensions of the order of 5000Å in bulk specimens. Such a wide range encompasses point defects (vacancies, interstitials and substitutional impurities) and their associated strain fields up to clusters of point defects (e.g. voids) or precipitates of second phase elements in an alloy or indeed any positional or compositional disorder. It is a complimentary technique to electron microscopy which provides very detailed information on the defect structure in real space over tiny localised volumes in the specimen. Neutron scattering provides a diffraction pattern of defect structure averaged over a volume of up to a few cubic centimeters. Of course a diffraction pattern cannot be unequivocally translated into real space, but this is balanced by the ability to investtigate the defect structure throughout a large volume of a sample in a relatively short time (a few minutes on a high flux neutron source).

Keywords

Neutron Beam Small Angle Neutron Scattering Defect Cluster Crystal Phonon Scatter Length Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1986

Authors and Affiliations

  • Roger J. Stewart
    • 1
  1. 1.J. J. Thomson Physical LaboratoryUniversity of ReadingReadingEngland

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