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首页> 外文期刊>Advanced Engineering Materials >Reconstructing a Nanoporous Metal in Three Dimensions: An Electron Tomography Study of Dealloyed Gold Leaf
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Reconstructing a Nanoporous Metal in Three Dimensions: An Electron Tomography Study of Dealloyed Gold Leaf

机译：Reconstructing a Nanoporous Metal in Three Dimensions: An Electron Tomography Study of Dealloyed Gold Leaf

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摘要

Dealloying is a chemically or electrochemically driven corrosion process in which the less noble component of an alloy is selectively removed. It has been used to produce monolithic metal bodies with a bi-continuous structure in which two phases, solid ligaments and pore space, interpenetrate at a characteristic length scale of a few nanometres. Ag-Au alloys form a model system for dealloying, since the continuous solid solubility and the very small difference in the atomic volumes of the constituents allow for an essentially coherent transformation from the master alloy to the nanoporous gold product structure. Recently, as nanoporous gold has become of interest for possible application as a low-temperature heat exchanger, catalyst or catalyst support, or actuator material, studies of dealloying have turned from understanding corrosion towards learning how to make porous nanomaterials for functional or structural applications. Concurrent with this trend is an emerging need for detailed characterization of materials science aspects of nanoporous gold. The defect structure of the material is the subject of ongoing research.

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