Hydrogen-Induced Enhancement of Atomic Diffusion in Metals

Abstract:

Atomic diffusion in metals is invariably enhanced by dissolution of hydrogen, in some cases by many orders of magnitude. This is a consequence of the formation of superabundant vacancies (SAVs), one of the general properties of M-H systems. Some examples of H-induced enhancement of interdiffusion in alloys and a detailed investigation of self-diffusion in Nb hydride, NbHx, are described, together with accelerated atomic migration observed in electrodeposited metals, also a consequence of SAV formation in the electrodeposition process.

• Periodical: Defect and Diffusion Forum (Volumes 297-301)
• Pages: 132-141
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.297-301.132
• Online since: April 2010
• Authors: Yuh Fukai
• Keywords: Diffusion Enhancement, Hydrogen in Electrodeposited Metals, Superabundant Vacancies, Vacancy Hydrogen Cluster

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DOI: 10.1016/s0925-8388(02)01270-7

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