ISSN:
1573-4889
Keywords:
iron oxidation
;
adherent scales
;
grain growth
;
diffusion coefficients
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract A study has been made of the structure of oxide layers formed at different times on abraded Fe oxidized in 1 atm O2 and CO2 at 550°C. A duplex Fe3O4 layer was formed and the inner layer was considered to grow by an oxide dissociation mechanism. The growth of both layers has been explained by a model, which correlates the overall kinetics with oxide grain growth. Derived values of the parabolic rate constant for lattice diffusion have been used to calculate self-diffusion coefficients, which were in good agreement with literature values for Fe diffusion in Fe3O4, but were very much larger than the values for either Fe or O in α-Fe2O3.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00612135
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