Accession Number : AD0489827

Title :   SUPERALLOY COATINGS FOR COMPONENTS FOR GAS TURBINE ENGINE APPLICATIONS.

Descriptive Note : Final rept. 1 Jul 64-30 Nov 65,

Corporate Author : PRATT AND WHITNEY AIRCRAFT GROUP EAST HARTFORD CT

Personal Author(s) : Petrusha, John A. ; Talboom, Frank P.

Report Date : FEB 1966

Pagination or Media Count : 186

Abstract : Structures and oxidation resistance of experimental and commercial aluminum-base coating systems were evaluated on several nickel-base and cobalt-base superalloys. Coating melting temperatures and the effect of substrate alloying elements on the coating were investigated and coating failure mechanisms were defined. A duplex coating system, Ta+Co-Al, was developed and optimized. The properties of the Ta+Co-Al system were evaluated and compared against similar properties of commercially coated superalloys. The effects of tantalum thickness and deposition techniques were also investigated. (Author)

Descriptors :   (*ALUMINUM COATINGS, GAS TURBINE BLADES), (*NICKEL ALLOYS, COATINGS), (*COBALT ALLOYS, COATINGS), (*CORROSION INHIBITION, COATINGS), (*TANTALUM, COATINGS), THICKNESS, SUBSTRATES, OPTIMIZATION, MICROSTRUCTURE, DIFFUSION, HIGH TEMPERATURE, HEAT RESISTANT ALLOYS, HEAT RESISTANT METALS, REFRACTORY METALS, THERMAL STABILITY, STRESSES, RUPTURE, X RAY DIFFRACTION.

Subject Categories : Coatings, Colorants and Finishes
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE