NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
High temperature oxidation resistant coatings for the directionally solidified Ni-Nb-Cr-Al eutectic superalloyProtective coatings required for the Ni-Nb-Cr-Al directionally solidified eutectic superalloy were developed and evaluated on the basis of oxidation resistance, diffusional stability, thermal fatigue, and creep resistance. NiCrAlY+Pt and NiCrAlY physical vapor-deposition coating systems exhibited the best combination of properties. Burner-rig testing indicated that the useful life of a 127-micron-thick NiCrAlY+Pt coating exceeds 1000 h at 1366 K. Eutectic-alloy creep lives at 1311 K and a stress of 151.7 MN/sq m were greater for NiCrAlY+Pt-coated specimens than for uncoated specimens by a factor of two.
Document ID
19770062644
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Strangman, T. E.
(Pratt and Whitney Aircraft East Hartford, CT, United States)
Ulion, N. E.
(United Technologies Corp. Pratt and Whitney Aircraft Group, East Hartford, Conn., United States)
Felten, E. J.
(Pratt and Whitney Aircraft East Hartford, CT, United States)
Date Acquired
August 9, 2013
Publication Date
August 1, 1977
Subject Category
Metallic Materials
Report/Patent Number
ACS PAPER 17-C-76
Accession Number
77A45496
Funding Number(s)
CONTRACT_GRANT: NAS3-18920
CONTRACT_GRANT: NAS3-16792
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available