Comparison of the cyclic oxidation behavior of beta-NiAl, beta-NiPtAl and gamma-gamma prime NiPtAl coatings on various superalloys
- ORNL
- Tennessee Technological University
Abstract The influence of exposure temperature on the cyclic oxidation behavior of simple and platinum aluminide coatings on various superalloy substrates was investigated. Coatings of -NiAl, -NiPtAl and - ' NiPtAl were tested and compared in dry oxygen at 1050 - 1150 aC. There was a clear influence of substrate sulfur content on the oxidation behavior of -NiAl coatings at all three temperatures. The impact of substrate impurities, especially S content, was significantly reduced for -NiPtAl coatings at all three temperatures. Simple { ' NiPtAl coatings showed excellent oxidation behavior up to 1100 aC on some alloys, but were more sensitive to substrate composition, especially Hf content, than were -NiPtAl coatings.
- Research Organization:
- Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory
- Sponsoring Organization:
- FE USDOE - Office of Fossil Energy (FE)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 952210
- Journal Information:
- Surface and Coatings Technology, Journal Name: Surface and Coatings Technology Journal Issue: 4-7 Vol. 202; ISSN 0257-8972; ISSN SCTEEJ
- Country of Publication:
- United States
- Language:
- English
Similar Records
The effect of Pt content on NiPtAl coatings
Cyclic Oxidation Behavior of HVOF Bond Coatings Deposited on La- and Y-doped Superalloys