Premium
Stress‐driven transport in ordered porous anodic films
Author(s) -
Houser Jerrod E.,
Hebert Kurt R.
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200779407
Subject(s) - ionic bonding , materials science , electric field , anode , stress (linguistics) , porosity , ionic conductivity , chemical physics , metal , porous medium , thermal conduction , flow (mathematics) , current (fluid) , composite material , chemical engineering , chemistry , ion , mechanics , electrode , thermodynamics , metallurgy , physics , linguistics , philosophy , organic chemistry , quantum mechanics , engineering , electrolyte
Ionic transport in porous anodic alumina (PAA) films during steady‐state growth was simulated, including effects of ionic migration in the electric potential and stress gradients, as well as material flow. The calculated flow patterns display similar characteristics to those revealed by experimental studies. The results indicate that the stress field driving the flow originates from three sources: volume change at the metal–film interface during oxidation, the nonlinear current–electric field relationship governing ionic conduction, and insertion of species at the film–solution interface. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)