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Use of Special Devices for the X-Ray Interferometric Investigation of Structural Imperfections in Single Crystals

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Abstract

A universal device for the X-ray interferometric study of structural defects in single crystals is designed, manufactured, and tested. The device can serve both for scratching the surface of the crystal block of an interferometer and for bending it. A technology for generating a dislocation in an interferometer block is also proposed. It is experimentally proved that the moiré topographic patterns obtained using a double X‑ray interferometer depend on the orientation of the reflection planes relative to the defect (dislocation). It is shown that multiple interferometers make it possible to simultaneously observe images of various structural imperfections. The results obtained make it possible to judge the spatial orientation of defects and the distribution of stress fields caused by these defects, i.e., stress fields can be visualized as X-ray moiré patterns. The results obtained in this work can form the basis for solving the inverse task, namely, the restoration of mechanical stress fields in the crystal blocks of an interferometer by the decoding of moiré patterns.

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Authors and Affiliations

  1. Institute of Applied Problems of Physics, National Academy of Sciences of the Republic of Armenia, 0014, Yerevan, Republic of Armenia

    H. R. Drmeyan & M. S. Vasilyan

  2. Nalbandyan State University of Shirak, 3126, Gyumri, Shirak, Republic of Armenia

    H. R. Drmeyan

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  1. H. R. Drmeyan
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  2. M. S. Vasilyan
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Drmeyan, H.R., Vasilyan, M.S. Use of Special Devices for the X-Ray Interferometric Investigation of Structural Imperfections in Single Crystals. J. Surf. Investig. 17, 1028–1033 (2023). https://doi.org/10.1134/S1027451023050038

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