Hostname: page-component-76fb5796d-qxdb6 Total loading time: 0 Render date: 2024-04-27T04:50:20.092Z Has data issue: false hasContentIssue false
  • English
  • Français

Characterization of the Degraded Microstructures of a Platinum Aluminide Coating

Published online by Cambridge University Press:  17 March 2011

Hyungjun Kim  and
Mark E. Walter
Hyungjun Kim
Affiliation:
Mechanical Engineering Department, The Ohio State University Columbus, OH 43210, U.S.A.
Mark E. Walter
Affiliation:
Mechanical Engineering Department, The Ohio State University Columbus, OH 43210, U.S.A.
Get access

Abstract

To investigate phase evolution of β-(Ni,Pt)Al/γ-(Ni3Al) in thermal barrier coating bond coat systems, specimens were subjected to 1200°C cyclic and isothermal heating. By removing the thermally grown oxide (TGO) after every 10 hours of heating, aluminum (Al) depletion from the bond coat was accelerated. Non-accelerated and accelerated Al-depletion samples were examined with scanning electron microscopy after every 10 hours of cyclic and isothermal heating. Observations from after the first 10 hours of thermal exposure show distinct microstructural differences. After 50 hours of heating, cyclic accelerated Al-depletion samples show more distinct grain boundaries and a higher proportion of-(Ni3Al) phase than isothermalaccelerated Al-depletion samples. Through instrumented micro-indentation, trends in elastic modulus were determined for isothermal and cyclic accelerated Al-depletion specimens.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 697: Symposium P – Surface Engineering 2001--Fundamentals and Applications , January 2001 , P4.2
Copyright
Copyright © Materials Research Society 2002

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. Mumm, D. R. and Evans, A. G., Acta Mater. 48, 1815–1827 (1827).Google Scholar
2. Tolpygo, V. K. and Clarke, D. R., Acta Mater. 48, 3283–3293 (3293).Google Scholar
3. He, M. Y., Evans, A. G. and Hutchinson, J. W., Acta Mater. 48, 2593–2601 (2601).Google Scholar
4. Mumm, D. R., Evans, A. G. and Spitsberg, I. T., Acta Mater. 49, 2329–2340 (2340).Google Scholar
5. Angenete, J. and Stiller, K., Material Science and Engineering. A316, 182–194 (194).Google Scholar
6. Epishin, A., Link, T., Portella, P. D. and Brückner, U., Acta Mater. 48, 4169–4177 (4177).Google Scholar
7. Miracle, D. B., Acta metal. mater. Vol.41, No.3, 649–684 (684).Google Scholar
8. Pharr, G. M., Oliver, W. C. and Brotzen, F. R., J. Mater. 7, 613–617 (617).Google Scholar