Degradation of MCrA1Y Coatings by Interdiffusion PUBLIC ACCESS

[+] Author Affiliations
P. Mazars, D. Manesse, C. Lopvet

Ste. Heurchrome, Colombes, France

Paper No. 87-GT-58, pp. V005T11A002; 5 pages
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Process Industries; General
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7927-6
  • Copyright © 1987 by ASME


Coatings such as NiCrA1Y, CoCrA1Y and FeCrA1Y are deposited by plasma spraying under partial pressure on commercial f.c.c. alloys of nickel, cobalt, and iron. The interdiffusion between coating and substrate is limited in the cases of NiCrA1Y/Ni base and CoCrA1Y/Co base. On the other hand, rapid diffusion of the aluminium into the substrate occurs in the system FeCrA1Y/Fe base.

When mixed systems MCrA1Y/M’ base are studied, an interdiffusion is usually observed between the elements M and M’ except in the case of the systems NiCrA1Y/Co base and FeCrA1Y/Co base where carbide diffusion barriers are formed.

Copyright © 1987 by ASME
Topics: Coatings
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