INVESTIGATION OF HIGH TEMPERATURE RESISTANT MATERIALS

Abstract

X-ray diffraction studies showed that for slipcast fused silica impregnated with AlCl3 the percentage bulk of cristobalite was reduced from 73.3% to 4.2% after 3 cycles following revised firing and impregnation procedures. Fused silica substrates could not be coated with alumina using conventional arc-spraying techniques. Procedures for arc-plasma flame glazing on fused silica are reported; average transverse strength over unglazed samples was increased 34%. Water absorption determinations indicated that the slipcast fused silica surfaces can be sealed by arcplasma glazing. F-40 Arc Plasma Unit alumina particle melting studies demonstrated that more complete particle melting took place when the high enthalpy-low velocity nozzle was used instead of the conventional No. 3 spray nozzle. Particles sprayed with the latter exploded on contact with water. Other studies included work on thermal shock, radome fabrication, and NOL sample evaluation in oxyhydrogen rocket motor exhaust.

Document Details

Document Type
Technical Report
Publication Date
Jul 31, 1961
Accession Number
AD0262238

Entities

People

  • J.d. Walton
  • N.e. Poulos
  • S.r. Elkins

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Arc Spraying
  • Diffraction
  • High Temperature
  • Materials
  • Nozzles
  • Optical Materials
  • Particles
  • Rocket Engines
  • Spray Nozzles
  • Substrates
  • Thermal Shock
  • X Rays
  • X-Ray Diffraction

Readers

  • Combustion science or combustion engineering.
  • Surface Coatings Technology.
  • Surface Engineering/Surface Coating Technology.