An SDE study of twin-wire electric arc sprayed nickel-aluminum coatings

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Description

An analytical and experimental study of the twin-wire electric arc spraying of nickel-aluminum coatings has been performed to demonstrate the suitability of the wire system as a bond coat material for ceramic overcoats in thermal barrier applications, and for spraying a single coat for part refurbishment. Experiments were conducted using a Box-type full-factorial design parametric study. Operating parameters were varied around the typical process parameters (i.e., current, primary and secondary pressure, spray distance) in a systematic design of experiments (SDE) in order to display the range of processing conditions and their effect on the resultant coating. The coatings were characterized ... continued below

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8 p.

Creation Information

Varacalle, D.J. Jr.; Wilson, G.C.; Lundberg, L.B.; Hale, D.L.; Zanchuck, V.; Kratochvil, W. et al. November 1, 1995.

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Description

An analytical and experimental study of the twin-wire electric arc spraying of nickel-aluminum coatings has been performed to demonstrate the suitability of the wire system as a bond coat material for ceramic overcoats in thermal barrier applications, and for spraying a single coat for part refurbishment. Experiments were conducted using a Box-type full-factorial design parametric study. Operating parameters were varied around the typical process parameters (i.e., current, primary and secondary pressure, spray distance) in a systematic design of experiments (SDE) in order to display the range of processing conditions and their effect on the resultant coating. The coatings were characterized by hardness tests and optical metallography. Coating properties were quantified for hardness, porosity, deposition efficiency, and microstructure. The features of the coatings are correlated with the changes in operating parameters. Analytical calculations of the gas and droplet dynamics are presented, which includes molten metal entrainment and droplet breakup models.

Physical Description

8 p.

Notes

OSTI as DE96004002

Source

  • 1995 National thermal spray conference, Houston, TX (United States), 11-15 Sep 1995

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  • Other: DE96004002
  • Report No.: INEL--95/00211
  • Report No.: CONF-9509182--8
  • Grant Number: AC07-94ID13223
  • DOI: 10.2172/125079 | External Link
  • Office of Scientific & Technical Information Report Number: 125079
  • Archival Resource Key: ark:/67531/metadc619292

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • November 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 24, 2016, 6:53 p.m.

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Varacalle, D.J. Jr.; Wilson, G.C.; Lundberg, L.B.; Hale, D.L.; Zanchuck, V.; Kratochvil, W. et al. An SDE study of twin-wire electric arc sprayed nickel-aluminum coatings, report, November 1, 1995; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc619292/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.