Abstract
Isothermal and cyclic oxidation studies have been carried out on (80–90) wt.% Mo-(8–17) wt.% Cr-(0.5–3) wt.% Pd alloys in atmospheres of both air and pure oxygen at temperatures between 1000 and 1250°C. The Pd additions decreased the oxidation rate with the most pronounced effect being observed for an alloy of 80 wt.% Mo-17 wt.% Cr-3 wt.% Pd. Palladium played a major role in providing the necessary oxidation protection by accelerating the formation of Cr2O3 layers at low Cr concentrations. Contrary to the behavior of most metals, an increase in oxidation resistance with increase in temperature was observed. Although the alloy systems were not truly oxidation resistant, definite improvement in oxidation resistance was achieved. The oxidation mechanism of Mo-Cr-Pd alloys is described.
Similar content being viewed by others
References
J. F. Stringer,AGARD Conference Proceedings No. 120 on High Temperature Corrosion of Aerospace Alloys (NATO, London, 1973), p. 284.
D. S. Evans,High Temp. Materials, 6th Plansee Seminar (Metallwerk Plansee, Austria, 1968), p. 42.
Y. Muramatsu and T. Takeda,Trans. Natl. Res. Inst. Met. (Jpn),24, 15 (1982).
D. B. Lee (Ph.D. thesis, Pennsylvania State University, 1987).
C. W. Corti,Platinum Met. Rev. 30, 184 (1986).
W. G. Moffat,The Handbook of Binary Phase Diagrams (Genium Pub. Corp., New York, 1976).
R. M. German and C. A. Labombard,J. Powder Met. Powder Tech. 18, 147 (1982).
I. Y. Dzykovich, V. V. Panichkina, V. V. Skorokhod, and L. I. Shaiderman,Sov. Powder Metall. Met. Ceram. 15, 151 (1976).
W. Zaiss, S. Steeb, and T. Krabichler,Z. Metallkd. 63, 180 (1972).
U. E. Ugaste,Fiz. Metal. Metalloved. 30, 1107 (1970).
J. Park and C. Alstetter,Scr. Metall. 19, 1481 (1985).
I. M. Allam, H. C. Akuezue, and D. P. Whittle,Oxid. Met. 14, 517 (1980).
C. Wagner,Corros. Sci. 8, 889 (1968).
D. B. Lee and G. Simkovich,Oxid. Met. 31, 265 (1989).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lee, D.B., Simkovich, G. Oxidation of molybdenum-chromium-palladium alloys. Oxid Met 34, 13–22 (1990). https://doi.org/10.1007/BF00664337
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00664337