Abstract

During the air plasma spray process large residual stresses form making the coating prone to delamination. Therefore, it is important to elucidate the mechanisms responsible for the high residual stresses. To determine an effective method to reduce the residual stresses present in the coating, heat treatments have been preformed to better understand the effects that a post-deposition heat treatment has on the microstructure and subsequent stress levels in the abradable coating. The microstructure and stress analyses techniques include x-ray diffraction, energy dispersive x-ray spectroscopy, and secondary electron microscopy. It was found, after analysis of the microstructure and residual stresses, that factors effecting the relief of stresses in the coating include a decrease of Si in solution and the formation of Si precipitates.

Original languageEnglish (US)
Title of host publicationTMS Annual Meeting
Pages249-255
Number of pages7
Volume3
StatePublished - 2009
EventTMS 2009 - 138th Annual Meeting and Exhibition - San Francisco, CA, United States
Duration: Feb 15 2009Feb 19 2009

Other

OtherTMS 2009 - 138th Annual Meeting and Exhibition
CountryUnited States
CitySan Francisco, CA
Period2/15/092/19/09

Fingerprint

residual stress
Residual stresses
Plasmas
coatings
Coatings
air
Air
microstructure
Microstructure
heat treatment
Heat treatment
X rays
Delamination
x ray spectroscopy
Electron microscopy
sprayers
Precipitates
precipitates
electron microscopy
x ray diffraction

Keywords

  • Abradable coatings
  • Al-Si
  • Plasma spray

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

Tucker, J. R., Abbott, B., Sivaramakrishnan, K., & Alford, T. (2009). Residual stress reduction for air plasma sprayed Al-Si abradable coating. In TMS Annual Meeting (Vol. 3, pp. 249-255)

Residual stress reduction for air plasma sprayed Al-Si abradable coating. / Tucker, J. R.; Abbott, B.; Sivaramakrishnan, K.; Alford, Terry.

TMS Annual Meeting. Vol. 3 2009. p. 249-255.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tucker, JR, Abbott, B, Sivaramakrishnan, K & Alford, T 2009, Residual stress reduction for air plasma sprayed Al-Si abradable coating. in TMS Annual Meeting. vol. 3, pp. 249-255, TMS 2009 - 138th Annual Meeting and Exhibition, San Francisco, CA, United States, 2/15/09.
Tucker JR, Abbott B, Sivaramakrishnan K, Alford T. Residual stress reduction for air plasma sprayed Al-Si abradable coating. In TMS Annual Meeting. Vol. 3. 2009. p. 249-255
Tucker, J. R. ; Abbott, B. ; Sivaramakrishnan, K. ; Alford, Terry. / Residual stress reduction for air plasma sprayed Al-Si abradable coating. TMS Annual Meeting. Vol. 3 2009. pp. 249-255
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AB - During the air plasma spray process large residual stresses form making the coating prone to delamination. Therefore, it is important to elucidate the mechanisms responsible for the high residual stresses. To determine an effective method to reduce the residual stresses present in the coating, heat treatments have been preformed to better understand the effects that a post-deposition heat treatment has on the microstructure and subsequent stress levels in the abradable coating. The microstructure and stress analyses techniques include x-ray diffraction, energy dispersive x-ray spectroscopy, and secondary electron microscopy. It was found, after analysis of the microstructure and residual stresses, that factors effecting the relief of stresses in the coating include a decrease of Si in solution and the formation of Si precipitates.

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