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Atom Probe Analysis of Ex Situ Gas-Charged Stable Hydrides

Published online by Cambridge University Press:  30 January 2017

Daniel Haley ,
Paul A. J. Bagot  and
Michael P. Moody
Daniel Haley*
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford, Oxfordshire OX1 3PH, UK
Paul A. J. Bagot
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford, Oxfordshire OX1 3PH, UK
Michael P. Moody
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford, Oxfordshire OX1 3PH, UK
*
*Corresponding author.daniel.haley@materials.ox.ac.uk
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Abstract

In this work, we report on the atom probe tomography analysis of two metallic hydrides formed by pressurized charging using an ex situ hydrogen charging cell, in the pressure range of 200–500 kPa (2–5 bar). Specifically we report on the deuterium charging of Pd/Rh and V systems. Using this ex situ system, we demonstrate the successful loading and subsequent atom probe analysis of deuterium within a Pd/Rh alloy, and demonstrate that deuterium is likely present within the oxide–metal interface of a native oxide formed on vanadium. Through these experiments, we demonstrate the feasibility of ex situ hydrogen analysis for hydrides via atom probe tomography, and thus a practical route to three-dimensional imaging of hydrogen in hydrides at the atomic scale.

Keywords

atom probehydrogenpalladiumdeuterium
Type
New Approaches and Correlative Microscopy
Information
Microscopy and Microanalysis , Volume 23 , Special Issue 2: Atom Probe Tomography & Microscopy 2016 , April 2017 , pp. 307 - 313
Copyright
© Microscopy Society of America 2017 

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