Plastic Instability of Platinum Modified and Unmodified Aluminide Coatings during 1100 C Cyclic Testing

Abstract

In a study conducted on the effect of cyclic oxidation at 1100 C on platinum modified and unmodified aluminide coated nickel base superalloy (IN- 738), a surface deformation described as rumpling was first reported. Rumpling was found to be a function of the number and type of thermal strain cycles, thermal expansion mismatch, coating strength and coating thickness. Further testing to determine the mechanical and protectivity impact of rumpling has been conducted. In addition, a concurrent study of the beta(NiA1) phase degradation was undertaken. Keywords:Turbine Blade Coatings; Platinum-Aluminides; Diffusion Coatings.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1986
Accession Number
ADA176110

Entities

People

  • Margaret A. Mccloskey

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Aluminum Oxides
  • Coatings
  • Engineering
  • Gas Turbines
  • Materials
  • Materials Engineering
  • Measurement
  • Mechanical Engineering
  • Mechanical Properties
  • Nickel Alloys
  • Oxidation Resistance
  • Propulsion Systems
  • Standards
  • Surface Roughness
  • Turbine Blades
  • Turbines
  • United States

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Surface Engineering/Surface Coating Technology.