Abstract
The oxidation behavior of undoped and Y-dopedhigh-purity FeCrAl at 1200°C was investigated. Thescale-growth processes were studied using two-stage16O/18O experiments andhigh-resolution imaging SIMS. SEM, TEM, and scanning transmission electronmicroscopy-electron-dispersive X-ray spectrometry(STEM-EDS) studies were performed in order to determinethe microstructure of the oxide and the chemistry of the metal-oxide interface. An equiaxedα-Al2O3 scale was found togrow by simultaneous outward Al and inward oxygendiffusion on the undoped FeCrAl. In contrast, a columnarα-Al2O3 grain structure on the Y-doped FeCrAl was produced by inwardoxygen diffusion; outward Al diffusion was suppressed.Y was shown to segregate toα-Al2O3 grain boundaries andto the metal-oxide interface.
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REFERENCES
F. A. Golightly, F. H. Stott, and G. C. Wood, Oxid. Met. 10, 163 (1976).
F. A. Golightly, F. H. Stott, and G. C. Wood, J. Electrochem. Soc. 126, 1035 (1979).
H. J. Schmutzler, H. Viefhaus, and H. J. Grabke, Surf. Interface Anal. 18, 581 (1992).
P. Y. Hou and J. Stringer, Oxid. Met. 38, 323 (1992).
D. R. Sigler, Oxid. Met. 40, 555 (1993).
K. Przybylski, A. J. Garratt-Reed, B. A. Pint, E. P. Katz, and G. J. Yurek, J. Electrochem. Soc. 134, 3207 (1987).
G. H. Meier, F. S. Pettit, and J. L. Smialek, Mater. Coros. 46, 232 (1995).
C. Mennicke, E. Schumann, C. Ulrich, and M. Rühle, Mater. Sci. Forum 251-254, 389 (1997).
R. Prescott and M. J. Graham, Oxid. Met. 38, 233 (1992).
R. J. Hussey, D. F. Mitchell, and M. J. Graham, Mater. Corros. 38, 575 (1987).
J. Jedlinski and G. Borchardt, Oxid. Met. 36, 317 (1991).
J. Jedlinski, M. J. Graham, G. I. Sproule, D. F. Mitchell, G. Borchardt, and A. Bernasik, Mater. Corros. 46, 297 (1995).
W. J. Quadakkers, H. Holzbrecher, K. G. Briefs, and H. Beske, Oxid. Met. 32, 67 (1989).
B. A. Pint, J. R. Martin, and L. W. Hobbs, Oxid. Met. 39, 167 (1993).
R. Prescott, D. F. Mitchell, M. J. Graham, and J. Doychak, Corros. Sci. 37, 1341 (1995).
R. Prescott, D. F. Mitchell, and M. J. Graham, Proc. 2nd Int. Conf. on Microscopy of Oxidation, S. B. Newcomb and M. J. Bennett, eds. (Institute of Materials, 1993), p. 455.
J. Le Coze, private communication.
J. Le Coze, R. Tardy, Andre Kobylanski, and M. Biscondi, Proc. 1st. Int. Conf. on Ultra High Purity Base Metals (The Japan Institute of Metals, Japan, 1995), p. 371.
A. Strecker, U. Salzberger, and J. Mayer, Prac. Metall. 30, 482 (1993).
E. Schumann, J. C. Yang, M. Rühle, and M. J. Graham, Oxid. Met. 46, 37 (1996).
B. A. Pint, Oxid. Met. 45, 1 (1996).
K. Przybylski and G. J. Yurek, Mater. Sci. Forum 43, 1 (1989).
B. Pieraggi and R. A. Rapp, J. Electrochem. Soc. 140, 2844 (1993).
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Mennicke, C., Schumann, E., Ruhle, M. et al. The Effect of Yttrium on the Growth Process and Microstructure of α-Al2O3 on FeCrAl. Oxidation of Metals 49, 455–466 (1998). https://doi.org/10.1023/A:1018803113093
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DOI: https://doi.org/10.1023/A:1018803113093