Abstract
The effect of platinum addition on the interdiffusion behavior of γ-Ni + γ′-Ni3Al alloys was studied by using diffusion couples comprised of a Ni-Al-Pt alloy mated to a Ni-Al, Ni-Al-Cr, or Ni-based commercial alloy. The commercial alloys studied were CMSX-4 and CMSX-10. Diffusion annealing was at 1150 °C for up to 100 hours. An Al-enriched γ′-layer often formed in the interdiffusion zone of a given couple during diffusion annealing due to the uphill diffusion of Al. This uphill diffusion was ascribed to Pt addition decreasing the chemical activity of aluminum in the γ + γ′ alloys. For a given diffusion couple end member, the thickening kinetics of the γ′ layer that formed increased with increasing Pt content in the Ni-Al-Pt γ + γ′ alloy. The γ′-layer thickening kinetics in diffusion couples with Cr showed less of a dependence on Pt concentration. Inference of a negative effect of Pt and positive effect of Cr on the Al diffusion in this system enabled explanation of the observed interdiffusion behaviors. There was no or minimal formation of detrimental topologically close-packed (TCP) phases in the interdiffusion zone of the couples with CMSX-4 or CMSX-10. An overlay Pt-modified γ + γ′ coating on CMSX-4 showed excellent oxidation resistance when exposed to air for 1000 hours at 1150 °C. Moreover, the Al content in the coating was maintained at a relatively high level due to Al replenishment from the CMSX-4 substrate.
Similar content being viewed by others
References
M. Peters, C. Leyens, U. Schulz, and W.A. Kaysser: Adv. Eng. Mater., 2001, vol. 3, pp. 193–204.
D.R. Clarke and C.G. Levi: Annu. Rev. Mater. Res., 2003, vol. 33, pp. 383–417.
V.K. Tolpygo, D.R. Clarke, and K.S. Murphy: Surf. Coating Technol., 2001, vols. 146–147, pp. 124–31.
Y.H. Sohn, J.H. Kim, E.H. Jordan, and M. Gell: Surf. Coating Technol., 2001, vol. 146–147, pp. 70–78.
A.G. Evans, M.Y. He, and J.W. Hutchinson: Progr. Mater. Sci., 2001, vol. 46, pp. 249–71.
M. Gell, K. Vaidyanathan, B. Barber, J. Cheng, and E. Jordan: Metall. Mater. Trans. A, 1999, vol. 30A, pp. 427–35.
V.K. Tolpygo and D.R. Clarke: Acta Mater., 2000, vol. 48, pp. 3283–93.
R. Panat, S. Zhang, and K.J. Hsia: Acta Mater., 2003, vol. 51, pp. 239–49.
Y. Zhang, J.A. Haynes, B.A. Pint, I.G. Wright, and W.Y. Lee: Surf. Coating Technol., 2003, vols. 163–164, pp. 19–24.
J.H. Chen and J.A. Little: Surf. Coating Technol., 1997, vol. 92, pp. 69–77.
Y.H. Zhang, D.M. Knowles, and P.J. Withers: Surf. Coating Technol., 1998, vol. 107, pp. 76–83.
J. R. Nicholls: MRS Bull., 2003, vol. 28, pp. 659–670.
B. Gleeson, W. Wang, S. Hayashi, and D. Sordelet: Iowa State University, Ames, IA, unpublished research, 2003.
B. Gleeson, W. Wang, S. Hayashi, and D. Sordelet: Mater. Sci. Forum, 2004, vols. 461–464, pp. 213–22.
A.G. Guy and C.B. Smith: Trans. ASM, 1962, vol. 55, pp. 1–9.
J.S. Kirkaldy and D.J. Young: Diffusion in the Condensed State, Institute of Metals, London, 1987, pp. 127–71.
J.S. Kirkaldy: in Advances in Materials Research, H. Herman, ed., Wiley, New York, NY, 1970, vol. 4, pp. 55–100.
E. Copland: NASA/CR-2005-213330, NASA, Cleveland, OH, 2005, pp. 1–28.
S. Hayashi, W. Wang, D. Sordelet, L.R. Walker, and B. Gleeson: Iowa State University, Ames, IA, unpublished research, 2003.
N.C. Oforka and B.B. Argent: J. Less-Common Met., 1985, vol. 114, pp. 97–109.
J.A. Nesbit and R.W. Heckel: Metall. Trans. A, 1987, vol. 18A, pp. 2075–86.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hayashi, S., Wang, W., Sordelet, D.J. et al. Interdiffusion behavior of Pt-modified γ-Ni + γ′-Ni3Al alloys coupled to Ni-Al-based alloys. Metall Mater Trans A 36, 1769–1775 (2005). https://doi.org/10.1007/s11661-005-0041-3
Received:
Issue Date:
DOI: https://doi.org/10.1007/s11661-005-0041-3