Chemical Reactions Between Propellant Gases and Nozzle Materials

Abstract

Hemispherical specimens of AGOT and ZT graphites were exposed to flowing streams of N, Ar, CO, and CO2 generated by a plasma torch, and erosion rates were determined. It was found that all gases erode the graphites to a substantial extent with CO2 being especially destructive. It is concluded that chemical reaction and mechanical abrasion (drag) are equally important parameters contributing to the over-all erosion rate. Electrically heated filament specimens (25-mil. diameter) of TaC were exposed to CO2 in the high pressure bomb and in the vacuum reactor. Losses were determined under a variety of test conditions. A technique for fabricating NbC wires was established, and production of filaments for future reaction studies was started. Specimens of pyrolytic graphite are being produced in an arc-image furnace by methane decomposition from flowing streams of methane and N on hemispherical AGOT substrates.

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Document Details

Document Type
Technical Report
Publication Date
May 15, 1963
Accession Number
AD0406625

Entities

People

  • E. L. Olcott
  • J. D. Batchelor
  • R. S. Scheffee
  • William E. West

Organizations

  • ARCO

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Body Weight
  • Carbon Monoxide
  • Chemical Reactions
  • Dielectric Gases
  • Diffusion
  • Electrodes
  • Jet Propulsion
  • Low Temperature
  • Material Degradation Processes
  • Materials
  • Materials Laboratories
  • Oxides
  • Physics Laboratories
  • Plastic Explosives
  • Propellants
  • Resistance
  • Tantalum Carbides

Readers

  • Combustion science or combustion engineering.
  • Reinforced Composite Materials
  • Strategic Security Studies