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Study of the Deformation State of a Crystal Plate with Inclined Seed Boundaries
Author(s) -
Lerche V.,
Härtwig J.
Publication year - 1992
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170270111
Subject(s) - isotropy , anisotropy , crystal (programming language) , materials science , basis (linear algebra) , condensed matter physics , elasticity (physics) , lattice (music) , deformation (meteorology) , homogeneous , point (geometry) , optics , geometry , physics , composite material , mathematics , thermodynamics , computer science , acoustics , programming language
The deformation state of crystal plates with an one‐dimensionally inhomogeneous concentration of point defects where the direction of inhomogeneity is arbitrarily inclined with respect to the surfaces of the plate was calculated according to the theory of elasticity for the general case of anisotropy. As an example synthetic quartz plates with seed boundaries were regarded. On the basis of the calculated strain field we simulated optical density distributions of X‐ray plane wave topographs of such crystals for a quantitative analysis of recorded topographs. Topography proved to be an alternative method in comparison with the determination of absolute lattice parameters for obtaining results concerning the anisotropy of quasiplastic strain due to the incorporation of point defects. Differing results on the basis of calculations according to the isotropic approximation of Hooke's law showed the necessity of anisotropic modelling in the present case.