STUDY OF DUCTILE COATINGS FOR THE OXIDATION PROTECTION OF COLUMBIUM AND MOLYBDENUM ALLOYS

Abstract

Platinum and Pt-10% Rh were examined as potential ductile oxidation resistant coatings for FS-85 (Cb-28Ta10W-1Zr) and TZM (Mo-0.5Ti-0.1Zr). oxidation tests on coating materials showed that 2-mil thicknesses would provide over 100 hours of protection up to 3000F in the absence of diffusion degradation. Roll bonded and hermetically sealed binary composites were evaluated for oxidation and diffusion behavior. Coating lifetimes of 5 to 15 hours at 2550F were attained before diffusion induced failure occurred. No significant differences were observed between static and cyclic oxidation behavior. Failure mechanisms of FS-85 and TZM composites were shown to be substantially different from each other. Six materials were evaluated in screening tests for potential diffusion barriers. Only ZrO2 showed any merit, while Re, Au, Al, BN and Al2O3 did not.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1964
Accession Number
AD0608135

Entities

People

  • E. H. Girard
  • J. J. Buchinski

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Aluminum Oxides
  • Body Weight
  • Ceramic Materials
  • Chemistry
  • Coatings
  • Composite Materials
  • Failure Mode And Effect Analysis
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Metal Matrix Composites
  • Oxidation
  • Physical Properties
  • Refractory Metals
  • Thickness

Fields of Study

  • Materials science

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Metallurgy