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Thermodynamics and kinetics of pack aluminide coating formation on IN-100An investigation of the effects of pack variables on the formation of aluminide coatings on nickel-base superalloy IN-100 was conducted. Also, the thermodynamics and kinetics of coating formation were analyzed. Observed coating weights were in good agreement with predictions made from the analysis. Pack temperature rather than pack aluminum activity controls the principal coating phase formed. Solid-state nickel diffusion controlled coating formation from sodium fluoride and chloride and ammonium fluoride activated packs. In other ammonium and sodium halide activated 1 weight percent aluminum packs, gaseous diffusion controlled coating formation.
Document ID
19740030214
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Levine, S. R.
Caves, R. M. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1973
Subject Category
Materials, Nonmetallic
Meeting Information
Meeting: National Meeting
Location: Boston, MA
Start Date: October 7, 1973
End Date: October 12, 1973
Sponsors: Electrochemical Society
Accession Number
74A12964
Distribution Limits
Public
Copyright
Other

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