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 oxide films. Experiments on oxidation kinetics and the micro structal and quantitative identification of the layers formed have been conducted on seven sys tems. Experiments on the effect of nitrogen on the diffusion processes that govern the growth of oxides in the Zr-Th-O system are described. The results obtained in the W-Hf-O, W-Hf-Re-O, Zr-N-O and ZrN-ThN-O systems and the Sn-Al-Cr and Sn-Al-La systems are given. Pre liminary experiments on the Zr-Y-O and Hf-Y-O systems are described. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 15, 1963
Accession Number
AD0419280

Entities

People

  • C.d. Dickinson
  • L.l. Seigle

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

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

Fields of Study

  • Materials science

Readers

  • Mycotoxin ecology in Amazonian ecosystems.
  • Surface Engineering/Surface Coating Technology.
  • Thin Film Deposition Science.