PROCESS FOR THE MANUFACTURING OF A THERMIC BARRIER ON A SUBSTRATE OF A SUPERALLOY ON THE BASE OF NICKEL OR A SUPERALLOY ON THE BASE OF COBALT

摘要

1519370 Coated nickel and cobalt alloys UNITED TECHNOLOGIES CORP 26 Aug 1976 [11 Sept 1975] 35521/76 Heading B2E A thermally protected Ni or Co superalloy, e.g. for use in combustion chambers, transition ducts and afterburner liners in gas turbine engines, has a metal bond coat which is an alloy of 15-40% G, 10-25% Al, up to 1% ythrium, the balance being a mixture of Fe, Co and Ni or a mixture of Ni and Co. The bond coat is overlaid with a zirconia base ceramic material. The concentration of ceramic may vary continuously from 0 at the bond coat to 100%. The coatings may be applied by plasma spraying.