Abstract
Simple displacement reactions in the solid state are considered with the purpose of predict-ing the morphologies and the reaction rates from a knowledge of pertinent thermodynamic and diffusion data. The theoretical predictions are substantiated by experimental observa-tions for four reaction couples [Ni/Cu2O, Co/Cu2O, Fe/Cu2O, and Fe/NiO] reacted at 1000°C. Displacement reactions are classified according to the product morphology; layered and ag-gregate arrangements of the product phases were observed, with two modifications (lamellar and interwoven) occurring within the aggregate morphological class. Parabolic kinetics for the growth of the product phases are observed for each couple. The magnitudes of the para-bolic rate constants for the couples which exhibit the layered arrangement are comparable with calculated values. A technique for controlling the product morphology is discussed, and a process for producing porous metal or oxide screens is introduced.
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Rapp, R.A., Ezis, A. & Yurek, G.J. Displacement reactions in the solid state. Metall Trans 4, 1283–1292 (1973). https://doi.org/10.1007/BF02644523
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DOI: https://doi.org/10.1007/BF02644523