NASA NTRS · 19810024730
A new diffusion-inhibited oxidation-resistant coating for superalloys
Abstract
A concept for enhanced protection of superalloys consists of adding an oxidation- and diffusion-resistant cermet layer between the superalloy and the outer oxidation-resistant metallic alloy coating. Such a duplex coating was compared with a physical-vapor-deposited (PVD) NiCrAlY coating in cyclic oxidation at 1150 C. The substrate alloy was MA 754 - an oxide-dispersion-strengthened superalloy that is difficult to coat. The duplex coating, applied by plasma spraying, outperformed the PVD coating on the basis of weight change and both macroscopic and metallographic observations.
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Gedwill, M. A., Glasgow, T. K., Levine, S. R.. 1981-08-01. A new diffusion-inhibited oxidation-resistant coating for superalloys. https://ntrs.nasa.gov/citations/19810024730
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