Performance of Diffusion Aluminide Coatings Applied on Alloy CF8C-Plus at 800oC

Conference · Sun Jan 01 04:00:00 EST 2012

OSTI ID:1044650

Kumar, Deepak ^[1]; Dryepondt, Sebastien N ^[1]; Zhang, Ying ^[2]; Haynes, James A ^[1]; Pint, Bruce A ^[1]; Armstrong, Beth L ^[1]; Shyam, Amit ^[1]; Lara-Curzio, Edgar ^[1]

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1. ORNL
2. Tennessee Technological University

High performance cast stainless steel, CF8C-Plus, is a low cost alloy with prospective applications ranging from covers and casings of small and medium size gas turbines to turbocharger housing and manifolds in internal combustion engines. Diffusion aluminide coatings were applied on this alloy as a potential strategy for improved oxidation resistance, particularly in wet air and steam. In this paper the performance of the aluminide coatings evaluated by cyclic oxidation experiments in air containing 10 vol.% H2O at 800 C and conventional tension-compression low-cycle-fatigue tests in air at 800 C with a strain range of 0.5% is presented. The results show that specimens coated by a chemical vapor deposition process provide better oxidation resistance than those coated by an Al-slurry coating process. The application of a coating by pack cementation reduced the fatigue life by 15%.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory; Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1044650
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
AIR
ALLOYS
CF8C-Plus
CHEMICAL VAPOR DEPOSITION
COATINGS
CORROSION
Coating
DIFFUSION
GAS TURBINES
INTERNAL COMBUSTION ENGINES
Low-cycle-fatigue
OXIDATION
Oxidation
PERFORMANCE
STAINLESS STEELS
STEAM
STRAINS
TURBOCHARGERS