An Evaluation of Coated Molybdenum and Columbium Alloys in High-Temperature Supersonic Airstreams

Abstract

An experimental study was made to investigate the oxidation behavior of four commercially coated refractory metal systems in supersonic airstreams: Durak B and Vought IX coated TZM and Cr-Ti-Si-and Cr-MoSi2 coated Cb-752. Cyclic coating life and temperature data were obtained on 0.375-inch-diameter (0.953 cm) blunt-nose models at surface temperatures from 2600 deg to 3000 deg F (1700 deg to 1920 deg K) and at air stagnation pressures behind the shock wave of 0.03, 0.10, and 5.5 atmospheres. The oxidation behavior of uncoated molybdenum- and columbium-alloy models of the same size and shape was also studied in the same test environments.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1968
Accession Number
ADA383327

Entities

People

  • Irvin M. Miller

Organizations

  • National Aeronautics and Space Administration

Tags

DTIC Thesaurus Topics

  • Air Pressure
  • Dynamic Tests
  • Failure Mode And Effect Analysis
  • High Pressure
  • High Temperature
  • Liquid Phases
  • Materials
  • Melting Point
  • Molybdenum
  • Molybdenum Alloys
  • Oxidation
  • Refractory Metal Alloys
  • Refractory Metals
  • Stagnation Pressure
  • Surface Temperature
  • Test And Evaluation
  • Test Facilities

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow