BEKLEDINGSMATERIAAL VOOR DE BESCHERMING VAN METALLISCHE ONDERLAGEN, EN EEN DAARVAN VOORZIENE GASTURBINECOMPONENT.

摘要

Improved coating compositions are described for the protection of superalloys at elevated temperatures. The coatings are of the MCrAlY type where M is nickel or cobalt and are significantly improved by the addition of from 0.1-7% silicon and 0.1-2% hafnium. Coatings of the invention are preferably applied by plasma spraying and as so applied are found to be substantially more effective than prior art coatings.