Accession Number : AD0883046
Title : Development of Improved Coatings for Nickel-and Cobalt-Base Alloys.
Descriptive Note : Final technical summary rept. 1 Jun 68-31 Jul 70,
Corporate Author : TRW EQUIPMENT GROUP CLEVELAND OHIO
Personal Author(s) : Nejedlik,James F.
Report Date : DEC 1970
Pagination or Media Count : 311
Abstract : The purpose of this study was to develop and upgrade aluminum containing coating systems for the protection of nickel and cobalt alloys used in gas turbine hot section components. A comprehensive investigation of modifying elements was undertaken and correlated with hot corrosion resistance and diffusional stability under blade and vane cycle conditions (1950 amd 2200F peak temperatures, respectively). The modifying elements and combinations evaluated were Co, Mn, Cr, Ta, Fe, Mg, Si, Y, Cr-Mn, Co-Cr and Fe-Cr. The influence of the modified coatings on mechanical properties, stress-oxidation, impact and thermal shock of the superalloys was also determined. (Author)
Descriptors : (*COATINGS, *CORROSION INHIBITION), (*NICKEL ALLOYS, COATINGS), (*COBALT ALLOYS, COATINGS), (*GAS TURBINE BLADES, PROTECTIVE TREATMENTS), DIFFUSION COATING, HEAT RESISTANT ALLOYS, HEAT RESISTANT METALS, ALUMINUM ALLOYS, IRON ALLOYS, CHROMIUM ALLOYS, MECHANICAL PROPERTIES
Subject Categories : Coatings, Colorants and Finishes
Properties of Metals and Alloys
Jet and Gas Turbine Engines
Distribution Statement : APPROVED FOR PUBLIC RELEASE