Hostname: page-component-848d4c4894-2xdlg Total loading time: 0 Render date: 2024-06-17T12:59:27.313Z Has data issue: false hasContentIssue false
  • English
  • Français

Anomalous Oxidation of Intermetallics

Published online by Cambridge University Press:  22 February 2011

D. A. Berztiss ,
F. S. Pettit  and
G. H. Meier
D. A. Berztiss
Affiliation:
University of Pittsburgh, Dept. of Materials Science and Engineering, 848 Benedum Hall, Pittsburgh, PA 15261
F. S. Pettit
Affiliation:
University of Pittsburgh, Dept. of Materials Science and Engineering, 848 Benedum Hall, Pittsburgh, PA 15261
G. H. Meier
Affiliation:
University of Pittsburgh, Dept. of Materials Science and Engineering, 848 Benedum Hall, Pittsburgh, PA 15261
Get access

Abstract

MoSi2, (γ-NiAl and TiAl with Cr additions are of interest for high temperature applications in oxidizing environments, where an oxide layer such as SiO2 or Al2O3 should form to protect the base material. At elevated temperatures (600-1700°C), a protective SiO2 layer forms on MoSi2, while near 500°C pesting and/or accelerated oxidation could disintegrate the material to powder as Mo and Si oxidize to form a complex, thick, non-protective oxide layer. Use of γ -TiAl is limited by poor oxidation resistance, whereby layered mixed oxides of TiO2 and Al2O3 form. With the addition of Cr from 4 to 34 at%, results are varied: protective Al2O3 formation, mixed oxide formation as with TiAl or more rapid oxidation than TiAl. NiAl is currently used as a diffusion coating on Ni-based superalloys and is being considered for use as a structural material itself because of its excellent oxidation resistance, i.e. forming α-alumina above 1000°C. Recent work indicates that pure NiAl oxidized under low oxygen partial pressures in a contained atmosphere develops nonprotective oxide scales similar to accelerated oxidation of MoSi2. This study explores the parameters defining protective behavior of these intermetallics and attempts to describe and explain anomalies at low temperatures and pressures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 1285
Copyright
Copyright © Materials Research Society 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Berztiss, D.A., Cerchiara, R.R., Gulbransen, E.A., Pettit, F.S. and Meier, G.H., Mat. Sci. and Eng., A155, 165 (1992).Google Scholar
2. Berztiss, D.A., M.S. Thesis, University of Pittsburgh, 1992 Google Scholar
3. Meschter, P.J., Met. Trans., 23A, 1763 (1992).Google Scholar
4. Perkins, R.A., Chiang, K.T., Meier, G.H., and Miller, R. in Oxidation of High-Temperature Intermetallics, edited by Grobstein, T., and Doychak, J. (The Minerals, Metals and Materials Society, Warrendale, PA, 1989), pp. 157–169.Google Scholar
5. Meier, G. H., Appolonia, D., Perkins, R. A., and Chiang, K. T. in Oxidation of High-Temperature Intermetallics, edited by Grobstein, T., and Doychak, J. (The Minerals, Metals and Materials Society, Warrendale, PA, 1989) pp. 185–193.Google Scholar
6. Lee, E.U. and Walden, J., Scripta Met., 22, 1389 (1988).Google Scholar
7. Stinner, C.P., M.S. Thesis, University of Pittsburgh, 1992.Google Scholar
8. Rakowski, J.R., M.S. Thesis, University of Pittsburgh, 1994.Google Scholar
9. Huang, S.-C. and Hall, E.L., Met. Trans. A, 22A, 2619 (1991).Google Scholar
10. Mohandas, E. and Beavan, P.A., Scripta Met. et Mat., 25, 2023 (1991).Google Scholar
11. Pfullmann, T. and Beavan, P.A., Scripta Met. et Mat., 28, 275 (1993).Google Scholar
12. Wunderlich, W., Kremser, T. and Frommeyer, G., für Metallkunde, Z., 81, 802 (1990).Google Scholar
13. Huang, S.-C., Hall, E.L. and Shih, D.S., ISIJ International, 31, 1100 (1991).Google Scholar
14. Beddoes, J.C., Wallace, W. and de Malherbe, M.C., Mat. and Manuf. Proc.,7, 527 (1992).Google Scholar
15. Masahashi, N., Mizuhara, Y., Matsuo, M., Hanamura, T., Kimura, M. and Hashimoto, K., ISIJ International, 31, 728 (1991).Google Scholar
16. McKee, D. W., and Huang, S.-C. in High-Temperature Ordered Intermetallic Alloys IV. edited by Johnson, L.A., Pope, D.P. and Stiegler, J.O. (Mater. Res. Soc. Proc. 213, Pittsburgh, PA, 1991), pp. 939–943.Google Scholar
17. Jin, C., Chen, W.J., Jing, K.L. and Wan, X.J., Scripta Met. et Mat., 29, 747(1993).Google Scholar
18. Perkins, R.A. and Meier, G.H. in Proceedings of the Industry-University Advanced Materials Conference II, edited by Smith, F. (Advanced Materials Institute, 1989), pp. 92.Google Scholar
19. McCarron, R.L., Schaeffer, J.C., Meier, G.H., Berztiss, D.A., Perkins, R.A. and Cullinan, J., in Titanium ‘92: Science and Technology - Vol. III., edited by Froes, F.H. and Caplan, I., (The Minerals, Metals and Materials Society, Warrendale, PA, 1993) pp. 1971–1978.Google Scholar
20. Grabke, H.J., Steinhorst, M., Brumm, M. and Wiemer, D., Oxid. of Met., 35, 199 (1991).Google Scholar
21. Grabke, H.J., Brumm, M. and Steinhorst, M., Mat. Sci. and Tech., 8, 339 (1992).Google Scholar
22. Brumm, M.W., Grabke, H.J. and Wagemann, B., Corr. Sci., 36, 37 (1994).Google Scholar
23. Sacco, G., Senior Thesis Project, University of Pittsburgh, 1994.Google Scholar
24. Westbrook, J.H. and Wood, D.L., J. of Nucl. Mat., 12, 208 (1964).Google Scholar