Diffraction-line shifts and broadenings in continuously and discontinuously coarsening precipitate-matrix systems: coarsening of initially coherent nitride precipitates in a ferrite matrix
Source abstract
Abstract
The initial precipitation of misfitting particles can be accompanied by elastic accommodation of the precipitate/matrix misfit leading to considerable matrix lattice dilatation/contraction and variable lattice microstrain. In this stage, the entire assembly of matrix and precipitate particles, as a whole, can diffract coherently. Upon aging of the system, relaxation of the accommodated misfit can occur by continuous and/or discontinuous coarsening of the precipitates. These processes are associated with distinctly different, characteristic diffraction phenomena, also involving a transition from coherent to incoherent diffraction of precipitates and matrix. For the case of, initially fully coherent, alloying element nitrides in a homogeneously nitrided ferrite matrix, these effects have been identified and analyzed, thus allowing tracing of misfit-relaxation processes.
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Research context
OpenAlex topics: Metal and Thin Film Mechanics · X-ray Diffraction in Crystallography · Advanced ceramic materials synthesis
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