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Untersuchungen zum Umwandlungsverhalten von InSn-Legierungen bei selektiver Korrosion
Authors:Hermann Kaiser
Abstract:Investigation of phase transformations induced by the selective dissolution of In from InSn alloys . In the context with the theory of dealloying the selective dissolution of In from InSn alloys has been investigated. As a consequence of their low melting-point the corrosion behaviour of these alloys differs significantly from the behaviour of higher-melting alloys. For the β-InSn phase this is illustrated by the result that a Sn-content of 20 at.%, supported by a porous morphology of the γ-SnIn product phase, does not excert a significant influence on the In-dissolution kinetics. Selective dissolution of In from γ-SnIn and from the β-Sn terminal phase is controlled, however, by solid-state diffusion of In to the electrode surface. Under these circumstances the product phase β-Sn that results from the removal of In from γ-SnIn at room temperature grows with a morphological stable interface and the concentration profiles within the interdiffusion zones can be directly detected by electron microprobe analysis.
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