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Non‐destructive microstructural analysis with depth resolution: application to seashells
Author(s) -
Zolotoyabko E.,
Quintana J. P.
Publication year - 2002
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889802011160
Subject(s) - materials science , crystallite , diffraction , microstructure , beamline , synchrotron , scanning electron microscope , penetration depth , x ray crystallography , resolution (logic) , optics , crystallography , mineralogy , composite material , chemistry , metallurgy , beam (structure) , physics , artificial intelligence , computer science
Energy‐variable X‐ray diffraction at a synchrotron beamline has been used to control the X‐ray penetration depth and thus to study structural parameters in polycrystalline and textured materials with depth resolution. This approach was applied to the investigation of the depth evolution of microstructure in the nacre layer of bivalvia seashells. According to conventional X‐ray diffraction and scanning electron microscopy, the nacre layer in the seashells of Acanthocardia tuberculata under investigation consists of large [001]‐oriented lamellae packed nearly parallel to the inner shell surface. In this paper, attention is focused on the microstructural information that can be extracted from the shapes of diffraction profiles (line profile analysis) measured at X‐ray energies that are varied by small steps. Depth dependences of the thickness of the lamellae and the average microstrain fluctuation are revealed.