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Determination of Transport Properties of Alumina Oxide Scale
Author(s) -
ABDERRAZIK G.,
MILLOT F.,
MOULIN G.,
HUNTZ A. M.
Publication year - 1985
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1985.tb15231.x
Subject(s) - impurity , oxide , materials science , diffusion , alloy , electric field , potential gradient , analytical chemistry (journal) , mineralogy , chemical engineering , chemistry , metallurgy , thermodynamics , environmental chemistry , physics , organic chemistry , quantum mechanics , engineering
By measuring the potential difference between the two interfaces of an alumina scale developed on a FeCrAl alloy, or by applying an electric field during its growth, values of t i , σ i , and σ e along with their temperature dependence were determined. A residual potential, V 0 , which was measured between the two oxide interfaces, is related to the oxygen chemical potential gradient on the scale. Alumina growth is controlled by oxygenion diffusion (by either V″ or O″ i ), and the transport properties are modified by the amount and distribution of impurities.