Kinetics of the lattice response to hydrogen absorption in Thin Pd and CoPd films

Sudhansu Sekhar Das, Gregory Kopnov, Alexander Gerber

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

תקציר

Hydrogen can penetrate reversibly a number of metals, occupy the interstitial sites and cause large expansion of the crystal lattice. The question discussed here is whether the kinetics of the structural response matches hydrogen absorption. We show that thin Pd and CoPd films exposed to a relatively rich hydrogen atmosphere (4% H2) inflate irreversibly, demonstrate the controllable shape memory, and duration of the process can be of orders of magnitude longer than hydrogen absorption. The dynamics of the out-of-equilibrium plastic creep are well described by the Avrami-type model of the nucleation and lateral domain wall expansion of the swelled sites.

שפה מקוריתאנגלית
מספר המאמר3597
כתב עתMolecules
כרך25
מספר גיליון16
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - אוג׳ 2020

ASJC Scopus subject areas

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  • ???subjectarea.asjc.3000.3002???
  • ???subjectarea.asjc.1600.1606???
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