HIGH VISCOSITY REFRACTORY FIBERS

Abstract

It was demonstrated in C glass, E glass, and silica that the viscosity of vitreous materials was increased by admixture of fine dispersions of insoluble, nonreactive, refractory materials. The effect was too large to be accounted for by volume immobilization and appeared to be due mainly to frictional forces between additive particles. Evidence was obtained that insoluble nonreactive additives, which were molten instead of solid, would also increase viscosity, provided the particle size was sufficiently fine. With vitreous reinforcing fibers aligned with the flow of heat, color in the fibers was shown to improve the thermal shielding afforded by the composite layer. Marked increases in the ablation resistance if silica through the additions of various additives appeared to be the result of cooling effects associated with the generally increased emissivities of the silica-additive mixtures. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1962
Accession Number
AD0272788

Entities

People

  • Stanley A. Dunn
  • William P. Roth

Tags

DTIC Thesaurus Topics

  • Ablation
  • Additives (Chemicals)
  • Composite Materials
  • Cooling
  • Dispersions
  • Emissivity
  • Materials
  • Mechanical Properties
  • Particle Size
  • Particles
  • Physical Properties
  • Refractory Materials
  • Resistance
  • Shielding
  • Viscosity

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Rocket Propulsion.