THE EFFECT OF PENETRANTS ON GRAPHITE, UNDER FIRING CONDITIONS,

Abstract

In preparing rocket motores for firing, penetrants are sprayed onto the gas-side surfaces of graphite nozzle-throat inserts to facilitate prefiring inspection. A study was made to determine the effects, if any, of such penetrants on the erosion rates of graphites. For this study, throat area changes were measured after firing twelve EM-4 test motors (EJC propellant), six motors incorporating ATJ graphite throat inserts and six pyrolytic graphite inserts. These inserts had been (1) sprayed with Partek (Black-lite) penetrant, (2) sprayed with alcohol penetrant, or (3) left unsprayed. Examination of the throat inserts after the firings and of the data obtained disclosed no difference in the appearance or erosion rates. It is concluded that a fluorescent (Partek) penetrant has no detrimental effet on graphite. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1963
Accession Number
AD0425845

Entities

People

  • W. R. Christopher

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Composite Materials
  • Energetic Materials
  • Graphitic Materials
  • Inspection
  • Materials
  • Propellants

Readers

  • Combustion and Flow Dynamics.
  • Materials Science and Engineering.
  • Metallurgy