Elastic versus alloying effects in Mg-based hydride films

TitleElastic versus alloying effects in Mg-based hydride films
Publication TypeJournal Article
Year of Publication2018
AuthorsA. Baldi, L. Mooij, V. Palmisano, H. Schreuders, G. Krishnan, B.J Kooi, B. Dam, R. Griessen
JournalPhysical Review Letters
Volume121
Issue25
Pagination255503
Date Published12/2018
Abstract

Magnesium thin films covered with a layer of Pd absorb hydrogen at much higher pressures than bulk Mg. Such an effect was originally explained as a consequence of elastic clamping on Mg by the capping Pd layer. An alternative interpretation later suggested that the pressure increase could originate from simple alloying between Mg and Pd. Here we resolve this controversy by measuring the hydrogenation and dehydrogenation isotherms of Mg-Pd thin film alloys over a wide range of compositions. Our results disentangle the effects of elastic clamping and alloying, and highlight the role of plastic deformations.

DOI10.1103/PhysRevLett.121.255503
Division

MaSF

Department

NEA

PID

d433643cfd96d39b1286431ccc266412

Alternate TitlePhys. Rev. Lett.

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