ADL-4D6: A Silica/Silica Composite for Hardened Antenna Windows.

Abstract

A silica/silica composite designated 'ADL-4D6' has been developed at GE/RESD for advanced missile shock-resistant antenna window applications. It is based on RESD's 'Omniweave' 4-D reinforcement system using high purity fused silica fibers, densified to 1.6 gm/cc by repeated infiltration with an aqueous suspension of colloidal silica. This paper describes an improved fabrication process, from both the performance and cost standpoint, and summarizes mechanical, thermal and electrical design data. The results of flyer plate testing show a spall threshold of 7300-8000 taps for a 1 inch thickness, the highest spall resistance (hardening) of any known inorganic dielectric material. Minimum flexure strenghts of 5000 psi and 1.0% strain to failure have been achieved. ADL-4D6 can thus be considered a 'ductile' ceramic'. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 30, 1976
Accession Number
ADA084883

Entities

People

  • J. Brazel
  • R. Fenton

Organizations

  • General Electric

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Advanced Materials
  • Antenna Windows
  • Composite Materials
  • Dielectric Permittivity
  • Dielectrics
  • Electron Microscopes
  • Fiber Reinforced Composites
  • Fiber Reinforcement
  • Lasers
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Mechanical Working
  • Mechanics
  • Optical Materials
  • Resistance
  • Tensile Strength

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Reinforced Composite Materials
  • Surface Coatings Technology.