Effects of self-stress on hydrogen diffusion in Pd membranes in the coexistence of α and β phases

Alessandra Adrover, Massimiliano Giona, Luigi Capobianco, Vittorio Violante

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Abstract

We analyze and compare the influence of lattice strain gradients on hydrogen absorption in tubular and planar membranes in the coexistence of α and β phases. We show, by means of numerical simulations and analytical arguments, that self-stresses strongly influence the dynamics of the propagation of the β phase within a planar membrane. Conversely, the α-β phase transition is only slightly influenced by lattice strain gradients in a tubular membrane. The occurrence of "uphill-diffusion" phenomena at the early stages of the permeation process is also addressed. © 2003 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)287 - 297
Number of pages11
JournalJournal of Alloys and Compounds
Volume368
Issue number1-2
DOIs
Publication statusPublished - 14 Apr 2004
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Metals and Alloys

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