Abstract
The effects of superficial (30–100 nm) La2O3 surface coatings on the oxidation kinetics of Ni from 700 to 1100°C in air and the oxide morphology of the NiO scales have been investigated. The parabolic rate constant is lower than for uncoated Ni by a factor of 5 to 10. The oxide morphology changes with the La2O3 coatings: The oxide scale consists of an outer fine-grain layer with an inner region of coarser, but still equiaxed, grains. SIMS shows that the majority of the La remains at the surface where a highly oxygen-defective spinel, La2Ni4O7, was found by TEM. Two-stage oxidation followed by SIMS profiling reveals that the oxide growth occurs inside the scales.
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REFERENCES
A. T. Chadwick and R. I. Taylor, Solid State Ionics 343 (1984).
D. P. Moon, Oxid. Met. 32, 47(1989).
F. Czerwinski and J. A. Szpunar, J. Sol-Gel Sci. Technol. 9, 103(1997).
A. A. Moosa and S. J. Rothman, Oxid. Met. 24, 133(1985).
X. Peng, D. H. Ping, T. F. Li, and W. T. Wu, J. Electrochem. Soc. 145, 389(1998).
X. Peng, T. F. Li, and W. T. Wu, Oxid. Met. 51, 291(1999).
X. Peng, T. F. Li, W. T. Wu, and W. P. Pan, Mater. Sci. Eng. A291, 100(2001).
A. T. Suntola, in Handbook of Crystal Growth, Vol. 3, D. T. J. Hurle, Jr. (ed.) (Elsevier, Amsterdam, 1994), p. 601.
J. I. Skarp, P. J. Soininen, and P. T. Soininen, Appl. Surf. Sci. 112, 251(1997).
D. M. Nieminen, M. Putkonen, and L. Niinistö, Appl. Surf. Sci. 174, 155(2001).
R. Haugsrud, in Ph.D Thesis, University of Oslo, 1999.
T. åkermark, G. Hultquist, and L. Gråsjö, J. Trace Microprobe Technol. 14, 377(1996).
N. Gayathri, A. K. Raychaudhuri, X. Q. Xu, J. L. Peng, and R. L. Greene, J. Phys. Cond. Mater. 10, 1323(1998).
V. V. Kharton, A. P. Viskup, E. N. Naumovich, and F. M. B. Marques, J. Mater. Chem. 9, 2623(1999).
T. Horita, M. Ishikawa, K. Yamaji, N. Sakai, H. Yokokawa, and M. Dokiya, Solid State Ionics 108, 383(1998).
A. A. Moosa, S. J. Rothman, and L. J. Nowicki, Oxid. Met. 24, 115(1985).
A. Atkinson and R. I. Taylor, Phil. Mag. A39, 581(1979).
A. Atkinson and R. I. Taylor, Phil. Mag. A43, 979(1981).
P. Kofstad in High Temperature Corrosion (Elsevier Appl. Sci., London, 1988).
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Haugsrud, R., Gunnaes, A. & Nilsen, O. High-Temperature Oxidation of Ni Coated with La2O3 by Atomic-Layer Chemical-Vapor Deposition (ALCVD). Oxidation of Metals 59, 215–232 (2003). https://doi.org/10.1023/A:1023083725880
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DOI: https://doi.org/10.1023/A:1023083725880