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Vacuum thermal dealloying of magnesium-based alloys for fabrication of nanoporous refractory metals

Published online by Cambridge University Press:  04 February 2019

Maria Kosmidou Open the ORCID record for Maria Kosmidou [Opens in a new window] ,
Michael J. Detisch ,
Tyler L. Maxwell  and
T. John Balk
Maria Kosmidou
Affiliation:
Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
Michael J. Detisch
Affiliation:
Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
Tyler L. Maxwell
Affiliation:
Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
T. John Balk*
Affiliation:
Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
*
Address all correspondence to T. John Balk at john.balk@uky.edu
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Abstract

A specialized dealloying technique called thermal dealloying was developed over 10 years ago for certain biomedical materials. This method is not widely used for synthesizing nanoporous metals. However, it offers advantages over conventional dealloying processes for fabrication of nanoporous structures, and is highly suitable for refractory metals that may be susceptible to oxidation during chemical/electrochemical dealloying and liquid metal dealloying. In this study, nanoporous structures were successfully fabricated from magnesium-based precursor alloys via sublimation of magnesium at elevated temperature under vacuum conditions. Different refractory metal diffusion rates affect the resulting density and amount of retained magnesium in each nanoporous material.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 1 , March 2019 , pp. 144 - 149
Copyright
Copyright © Materials Research Society 2019 

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