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

Abstract

Oxidation loss rates for platinum and platinum rhodium alloy samples were determined to be 1.98 and 2.40 microinches per hour, respectively, at 2550 F in an air flow of 480 ipm. Tests on coating-base metal composites showed coated TZM and FS-85 to be attacked differently. Molybdenum from the TZM was found to diffuse through the coating and be removed at its surface as a volatile oxide. Oxygen penetrated the coatings on the FS-85 samples in a discontinuous manner, causing blisters of oxide to be formed which eventually burst through the coating. Details of the diffusion-oxidation mechanisms remain to be determined.

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Document Details

Document Type
Technical Report
Publication Date
Mar 31, 1964
Accession Number
AD0434441

Entities

People

  • E. H. Girard
  • J. J. Buckinski

Tags

Communities of Interest

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

DTIC Thesaurus Topics

  • Air Force
  • Body Weight
  • Ceramic Materials
  • Coatings
  • Dew Point
  • Heat Of Activation
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Mechanical Properties
  • Metal Matrix Composites
  • Molybdenum
  • Molybdenum Alloys
  • Oxidation Resistance
  • Refractory Metals
  • Rhodium Alloys
  • Surface Properties

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Thin Film Deposition Science.
  • ballistics.