Oxidation Behavior of a Complex Disilicide Coating - Ta-10W Alloy System at Temperatures of 1700 to 2700 F

Abstract

The oxidation behavior of a complex disilicide coating - 90Ta-10W alloy system was studied using thermogravimetric, X-ray diffraction and electron microprobe analyses. The coating afforded the alloy substrate complete protection against static oxidation for at least 200 hours at temperatures between 1700 to 2700 F. The excellent oxidation resistance of the coating system is due to the formation of a protective layer which consists mainly of SiO2 with some Ti, V, and W in solution and a second dispersed phase of TiO2. While this protective layer is glassy at and above 2100 F, the reaction products become increasingly crystalline with decreasing temperature between 1700 and 2000 F.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1971
Accession Number
AD0741805

Entities

People

  • Joseph J. Falco
  • Milton Levy

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Body Weight
  • Coatings
  • Diffraction
  • High Temperature
  • Materials
  • Materials Science
  • Mechanics
  • Metals
  • Oxidation Resistance
  • Oxides
  • Refractory Metals
  • Substrates
  • Titanium
  • Turbines
  • United States
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Surface Coatings Technology.
  • Thin Film Deposition Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene