Abstract
The pattern of evolution of the defect structure in the Pd-H system during phase transformations is formulated on the basis of x-ray data. It is shown that once the random dislocations formed during phase transformations in the a phase reach their critical density, they assemble into dislocation walls. This process results in the formation of a cellular dislocation substructure in the α phase. After the formation of the cellular substructure in the α phase the random dislocations created during phase transformations climb into the hydride phase, thereby curtailing the evolution of defect structure in the α phase. The subsequent influx of dislocations into the β phase maintains continued evolution of the defect structure (from cellular to block dislocation substructure). Not until that time is it possible for the evolution of the defect structure in the α phase to terminate, culminating in the formation of a block substructure. The nature of the observed phenomenon is discussed.
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Fiz. Tverd. Tela (St. Petersburg) 39, 1275–1281 (July 1997)
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Katsnel’son, A.A., Knyazeva, M.A., Revkevich, G.P. et al. Characteristics of the evolution of defect structure during phase transformations in the Pd-H system. Phys. Solid State 39, 1132–1138 (1997). https://doi.org/10.1134/1.1130030
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DOI: https://doi.org/10.1134/1.1130030