An Investigation of the Oxide Adhesion and Growth Characteristics on Platinum Modified Aluminide Coatings.

Abstract

The operating environment for superalloy blades and vanes in gas turbine engines has necessitated the developed of alloy coatings to achieve satisfactory resistance of the metal to oxidation and hot corrosion. Aluminide coatings were initially developed to meet this need. Recently it was shown that platinum additions significantly improve the oxidation resistance of these aluminide coatings. The effects of pre-aluminizing surface smoothness and coating structure for both platinum modified and unmodified aluminide coatings on IN-738 in a cyclic oxidation environment at 1100 C were examined. Weight change measurements were used to determine the coating oxide scale adherence characteristics and to quantify the cyclic oxidation behavior of the various coating structures.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1986
Accession Number
ADA175305

Entities

People

  • Margaret S. Farrell

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Adhesion
  • Body Weight
  • Coatings
  • Corrosion Resistance
  • Gas Turbines
  • High Temperature
  • Materials
  • Measurement
  • Mechanical Engineering
  • Mechanical Properties
  • Oxidation Resistance
  • Resistance
  • Surface Properties
  • Surface Roughness
  • Turbine Blades
  • Turbine Components
  • Turbines

Fields of Study

  • Materials science

Readers

  • Aerodynamics.
  • Surface Engineering/Surface Coating Technology.