Electrochemical characterization of solid materials in volume range II. Physical process parameters in phase isolation process |
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Authors: | Kunath J. Gruner W. |
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Affiliation: | (1) Academy of Sciences of the German Democratic Republic, Central Institute of Solid-State Physics and Materials Research, Helmholtzstrasse 20, DDR-8027 Dresden, German Democratic Republic |
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Abstract: | In this paper, the electrochemical phase isolation (EPI) is discussed as a process at higher current densities in which the desirable enrichment of precipitated phase particles leads to a blocking of the surface. This effect impedes the matrix dissolution rate. Under galvanostatic conditions, a higher current causes a heat build-up within the porous layer and accelerates the kinetics up to the moment when the saturation concentration is reached in the pores. Under this aspect, experiments for iron carbide isolation from a steel matrix are described. |
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Keywords: | material sciences precipitation electrochemical analysis enrichment techniques |
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