HIGH TEMPERATURE OXIDATION PROTECTIVE COATINGS FOR VANADIUM-BASE ALLOYS

Abstract

The influence of thermal history for a standardized pack siliconizing process has been established for 0.020- to 0.030-inch sheet of the V-60w/o Cb-1 w/o Ti alloy. Studies of coating thickness as a function of siliconizing time over the temperature range of 2000 to 2200 F were made. Coating thickness of 2.25 to 2.75 mils appears to offer optimum oxidation protection based on static air oxidation tests at 2200 F; specimens were exposed for more than 500 hours without evidence of failure. Thick coatings (4 mils or greater) suffer gross delamination or severe cracking during elastic bending of sheet materials which results in a loss of protective capability. The thicker coatings also appear to behave poorly in high temperature, thermal cycle oxidation tests in an oxygen-hydrogen torch.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1963
Accession Number
AD0406237

Entities

People

  • F. C. Holtz
  • J. J. Rausch

Organizations

  • IIT Research Institute

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Human Systems
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Coatings
  • Contracts
  • Geometry
  • High Temperature
  • Illinois
  • Materials
  • Mechanical Properties
  • Metals
  • North America
  • Oxidation
  • Plastic Deformation
  • Protective Coatings
  • Test And Evaluation
  • Thickness
  • Vanadium
  • Vanadium Alloys

Fields of Study

  • Materials science

Readers

  • Surface Engineering/Surface Coating Technology.