Surface modification of nickel based alloys for improved oxidation resistance
Conference
·
OSTI ID:901108
The present research is aimed at the evaluation of a surface modification treatment to enhance the high temperature stability of nickel-base superalloys. A low Coefficient Thermal Expansion (CTE ~12.5x10-6/°C) alloy based on the composition (in weight %) of Ni-22Mo-12.5Cr was produced by Vacuum Induction Melting and Vacuum Arc Melting and reduced to sheet by conventional thermal-mechanical processing. A surface treatment was devised to enhance the oxidation resistance of the alloys at high temperature. Oxidation tests (in dry and wet air; treated and untreated) were conducted 800°C to evaluate the oxidation resistance of the alloys. The results were compared to the behavior of Haynes 230 (Ni-22Cr) in the treated and untreated conditions. The treatment was not very effective for Haynes 230, as this alloy had similar oxidation behavior in both the treated and untreated conditions. However, the treatment had a significant effect on the behavior of the low CTE alloy. At 800°C, the untreated Ni-12.5Cr alloy was 5 times less oxidation resistant than Haynes 230. However, in the treated condition, the Ni-12.5Cr alloy had comparable oxidation resistance to the Haynes 230 alloy.
- Research Organization:
- Albany Research Center (ARC), Albany, OR
- Sponsoring Organization:
- USDOE - Office of Fossil Energy (FE)
- OSTI ID:
- 901108
- Report Number(s):
- DOE/ARC-2005-086
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of Low Coefficient of Thermal Expansion (CTE) Nickel Alloys Containing 12.5% Chromium
Development of low coefficient of thermal expansion (CTE) nickel alloys for potential use as interconnects in SOFC
Surface modification of ferritic and Ni based alloys for improved oxidation resistance of SOFC interconnect applications
Conference
·
Mon Jan 31 23:00:00 EST 2005
·
OSTI ID:901546
Development of low coefficient of thermal expansion (CTE) nickel alloys for potential use as interconnects in SOFC
Conference
·
Sun Oct 31 23:00:00 EST 2004
·
OSTI ID:901604
Surface modification of ferritic and Ni based alloys for improved oxidation resistance of SOFC interconnect applications
Conference
·
Mon Aug 01 00:00:00 EDT 2005
· Ceramic Engineering and Science Proceedings
·
OSTI ID:901110