EXPERIMENTAL STUDY OF FACTORS CONTROLLING THE EFFECTIVENESS OF HIGH- TEMPERATURE PROTECTIVE COATINGS FOR TUNGSTEN

Abstract

Two processes governing the efficacy of high temperature protective coatings for tungsten, interdiffusion in ternary oxygen-metal-metal systems and breakaway during oxide film growth, are being investigated experimentally to deter mine the oxidation behavior of binary alloys and the influence of substrate mechanical properties on the growth characteristics of the films. Experiments involving oxidation kinetics and the microstructural and quantitative identification of the layers formed have been conducted on four systems. An analysis of the diffusion processes governing growth in the Zr-Th- O system is pre sented, and a preliminary discussion of the re sults obtained in the W-Hf-O, ZrN-ThN-O and Sn Al-Cr systems is given.

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Document Details

Document Type
Technical Report
Publication Date
Dec 15, 1962
Accession Number
AD0404906

Entities

People

  • C. D. Dickinson
  • L. L. Seigle
  • M. G. Nicholas

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Binary Alloys
  • Coatings
  • Films
  • High Temperature
  • Mechanical Properties
  • Metals
  • Oxidation
  • Oxide Films
  • Oxides
  • Procurement
  • Protective Coatings
  • Substrates
  • Tungsten

Fields of Study

  • Materials science

Readers

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  • Surface Engineering/Surface Coating Technology.