Burner rig evaluation of thermal barrier coating

Technical Report · Sun Feb 01 04:00:00 EST 1981

OSTI ID:5854527

Gedwill, M A

Eight plasma sprayed bond coatings were evaluated for their potential use with ZrO/sub 2/-Y/sub 2/O/sub 3/ thermal barrier coatings (TBCs) which are being developed for coal derived fuel fired gas turbines. Longer TBC lives in cyclic burner rig oxidation to 1050 C were achieved with the more oxidation resistant bond coatings. These were Ni-14.1Cr-13.4A1-0.10Ar, Ni-14.1C4-14.4Al-0.16Y, and Ni-15.8Cr-12.8Al-0.36Y on Rene 41. The TBC systems performed best when 0.015-cm thick bond coatings were employed that were sprayed at 20 kW using argon 3.5v/o hydrogen. Cycling had a more life limiting influence on the TBC than accumulated time at 1050 C.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 5854527
• Report Number(s): NASA-TM-81684
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL LIQUIDS
COATINGS
EVALUATION
FLUIDS
GAS TURBINES
LIQUIDS
MACHINERY
NICKEL ALLOYS
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OXIDES
OXYGEN COMPOUNDS
SHIELDS
SPRAYED COATINGS
THERMAL SHIELDS
TRANSITION ELEMENT COMPOUNDS
TURBINES
TURBOMACHINERY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES