Oxidation of Metals

, Volume 39, Issue 3–4, pp 231–261 | Cite as

The isothermal-oxidation behavior of several nickel-base single-crystal superalloys with and without coatings

  • M. Göbel
  • A. Rahmel
  • M. Schütze
Article

Abstract

Several commercial single-crystal superalloys (CMSX-2, CMSX-3, CMSX-4, CMSX-6, SRR 99) and some laboratory versions of one of them (CMSX-4) with various Y-additions were investigated concerning their oxidation resistance in air at temperatures between 800 and 1200°C. The investigations also included two materials (CMSX-6, SRR 99) with an RT-22 coating. Weight change was recorded for times of up to 1000 hr (in some cases up to 1600 hr). Oxidized coatings and substrates were characterized by metallography, SEM, and microprobe analysis. Most of the alloys showed good oxidation resistance up to 1000°C, while there was complete spalling during cooling after oxidation at 1150°C and 1200°C for the uncoated and Y-free alloys. Coated alloys were superior, however the best behavior was shown by a laboratory version of CMSX-4 containing between 10 and 60 ppm Y. Interdiffusion at 1000°C is tolerable for the coated alloys, but there was extremely rapid degradation of the coating by interdiffusion at 1200°C.

Key words

oxidation single-crystal superalloys coating reactive-element effect 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. M. Huntz, A. Boumaza, and G. Moulin,Oxid. Met. 30, 141 (1988).Google Scholar
  2. 2.
    A. M. Huntz, A. Boumaza, G. Moulin, and J. L. Lebrun,Key Eng. Mater. 20–28, 3565–3576 (1988).Google Scholar
  3. 3.
    M. Levy, P. Farrell, and F. Pettit,Corrosion 42, 708 (1986).Google Scholar
  4. 4.
    M. Levy, R. Huie, and F. Pettit,Corrosion 45, 661 (1989).Google Scholar
  5. 5.
    B. Pieraggi and F. Dabosi,Werkst. Korros. 38, 584 (1987).Google Scholar
  6. 6.
    M. G. Hebsur and R. V. Miner,J. Mater. Energy Syst. 8, 363 (1987).Google Scholar
  7. 7.
    M. Khobaib and F. W. Vahldiek, inCorrosion and Particle Erosion at High Temperatures, V. Srinivasan and K. Vedula eds. (The Minerals, Metals & Materials Society, Warrendale, PA, 1989), p. 515.Google Scholar
  8. 8.
    M. J. Bennett and D. P. Moon, inThe Role of Active Elements in the Oxidation Behaviour of High Temperature Metals and Alloys, E. Lang, ed. (Elsevier Applied Science, London, 1989), p. 111.Google Scholar
  9. 9.
    J. R. Nicholls and P. Hancock, inThe Role of Active Elements in the Oxidation Behaviour of High Temperature Metals and Alloys, E. Lang, ed. (Elsevier Applied Science, London, 1989), p. 195.Google Scholar
  10. 10.
    D. P. Whittle and J. Stringer,Phil. Trans. R. Soc. Lond. A295, 109 (1980).Google Scholar
  11. 11.
    R. Streiff and D. H. Boone,J. Mater. Eng. 10, 15 (1988).Google Scholar
  12. 12.
    P. D. Portella, D. Aurich, W. Österle, and J. Ziebs, in Symposium Materialforschung 1988, BMFT, Bonn, 1988, p. 1333.Google Scholar
  13. 13.
    K. Harris, G. L. Erickson and R. E. Schwer, ASME Paper, 83-GT-244.Google Scholar
  14. 14.
    C. S. Giggins and F. S. Pettit,J. Electr. Soc. 118, 1782 (1971).Google Scholar
  15. 15.
    L. Singheiser, H. W. Grünling, and K. Schneider,Surf. Coat. Technol. 42, 107 (1990).Google Scholar
  16. 16.
    S. J. Grisaffe, inThe Superalloys, C. T. Sims and W. C. Hagel, eds. (John Wiley & Sons, New York, 1972).Google Scholar
  17. 17.
    J. Litz, A. Rahmel, and M. Schorr,Oxid. Met. 30, 95 (1988).Google Scholar
  18. 18.
    J. M. Oblak and W. A. Owczarski,Trans. Met. Soc. AIME 242, 1563 (1968).Google Scholar
  19. 19.
    J. Litz, A. Rahmel, M. Schorr, and J. Weiss,Oxid. Met. 32, 167 (1989).Google Scholar
  20. 20.
    B. K. Tubbs and J. L. Smialek, inCorrosion and Particle Erosion at High Temperatures, V. Srinivasan and K. Vedula, eds. (The Minerals, Metals & Materials Society, 1989), p. 459.Google Scholar

Copyright information

© Plenum Publishing Corporation 1993

Authors and Affiliations

  • M. Göbel
    • 1
  • A. Rahmel
    • 2
  • M. Schütze
    • 2
  1. 1.Sandoz AGBaselSwitzerland
  2. 2.Karl-Winnacker-Institut der DECHEMA e.V.Frankfurt am Main 15Germany

Personalised recommendations