Abstract
The oxidation behavior of Ni—20Cr foils of 100- and 200-μm thickness wasstudied in air between 500 and 900°C. Simultaneously, the morphology,microstructure, and composition of the oxide layers were determined byscanning and transmission electron microscopies. Depending on thetemperature, the oxide layer differed significantly. The scale formedat all temperatures was complex, with an outer NiO layer having columnargrains, and an inner layer of equiaxedNiCr2O4+NiO+Cr2O3 grains. At low temperatures (500 and 600°C),the chromium content was insufficient to form a continuousCr2O3 layer, while such a continuous layer formed at theinner interface at oxidation temperatures of 700 to 900°C. At 600°C,internal oxidation of chromium occurred in the substrate. The oxidationmechanism is described taking into account these morphologies and theoxidation kinetics. The observation of no significant differences betweenthe oxidation behavior of thin strips and thick materials is related to thelimited exposure times of the study.
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REFERENCES
P. Moulin, A. M. Huntz, and P. Lacombe, Acta Metall. 28, 745 (1980).
C. S. Giggins and F. S. Pettit, Trans Met. AIME 245, 2495 (1969).
D. L. Douglass, Corros. Sci., 8, 665 (1968).
R. Molins and E. Andrieu, Microscopy of Oxidation 2, S. B. Newcomb and M. J. Bennett, eds, (Institute of Materials, London 1993), p. 162.
R. Molins, G. Hochstetter, J. C. Chassaigne, and E. Andrieu, Acta Metall. 45, 663 (1997).
A. M. Huntz, S. Daghigh, A. Piant, and J. L. Lebrun, Mater. Sci Eng. A248, 44 (1998).
K. Messaoudi, Ph.D. Thesis, Université Paris XI, Orsay, France, 1997.
G. Calvarin Amiri, Ph.D. Thesis, Univerité Paris XI, Orsay, France, 1998.
P. Moulin, Ph.D. Thesis, Université Paris XI, Orsay, France, 1978.
A. Aubry, Ph.D. Thesis, UTC, France, 1985.
C. Courty, F. Armanet, G. Béranger, J. L. Lebrun, and C. Faroux, Analusis 16, 363 (1998).
G. Ben Abderrazik, G. Moulin, and A. M. Huntz, Oxid. Met. 33, 191, 237 (1990).
P. Faure, Ph.D. Thesis, Institut National Polytechnique de Toulouse, France, 1979.
C. Liu, Ph.D. Thesis, ENSAM, France, 1991.
F. N. Rhines and R. G. Connel, J. Electrochem. Soc. 124, 1122 (1977).
A. Atkinson and R. I. Taylor, Phil. Mag. A39, 581 (1979); Phil. Mag. A43, 979 (1981).
C. Dubois, Ph.D. Thesis, Université Paris XI, Orsay, France, 1979.
B. Lesage and M. Déchamps, Proc. DIMAT 92, Defect and Diffusion Forum 95-98, 1077 (1993).
S. C. Tsaï, Ph.D. Thesis, Université Paris XI, Orsay, France, 1996.
S. C. Tsaï, A. M. Huntz, and C. Dolin, Mater. Sci Eng. A212, 6 (1996).
G. C. Wood, F. H. Stott, D. P. Whittle, Y. Shida, and B. D. Bastow, Corros. Sci. 23, 9 (1983).
Y. Saïto, T. Inoue, T. Maruyama, and T. Amano, Proc. JIMIS-3 in High Temperature Corrosion of Metals and Alloys, Suppl. (The Japan Institute of Metals, 1983), p. 191. JIM, Aoba, Aramaki, Sendai, 980, Japan.
A. M. Huntz, J. Phys. 5, 1729 (1995).
A. Atkinson, Rev. Modern Phys. 57, 437 (1985).
R. Farhi and G. Petot-Ervas, J. Phys. Chem. Solids 39, 1169, 1175 (1978).
M. Jinénez-Melendo, A. Dominguez-Rodriguez, and R. Marquez, Phil. Mag. A56, 767 (1987).
A. G. S. Sabioni, Ph.D. Thesis, Université Paris XI, Orsay, France, 1990.
C. K. Kim and L. W. Hobbs, Oxid. Met. 45, 247 (1996).
H. V. Atkinson, Oxid. Met. 28, 353 (1987).
H. T. Sawhill and L. W. Hobbs, J. Phys. 46. C4-117 (1985).
P. Moulin, A. M. Huntz, G. Béranger, and P. Lacombe, Scripta Metall. 11, 533 (1977).
J. G. Zhao, A. M. Huntz, P. Couffin, and J. L. Baron, Acta Metall. 34, 1351 (1986).
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Calvarin, G., Molins, R. & Huntz, A.M. Oxidation Mechanism of Ni—20Cr Foils and Its Relation to the Oxide-Scale Microstructure. Oxidation of Metals 53, 25–48 (2000). https://doi.org/10.1023/A:1004578513020
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DOI: https://doi.org/10.1023/A:1004578513020