Structural Response of Oxidation Resistant Carbon-Carbon Composites Under Cyclic and Monotonic Loading

Abstract

Oxidation damage of carbon carbon laminates at 900 deg C and its affect on shear modulus, mass loss, and electrical resistance is studied. Preferential fiber bundle oxidation with some matrix cracking is initially observed. Fiber bundles are severely damaged and increased matrix damage is observed with time. Mass loss results indicate oxidation is diffusion controlled at 9O deg C. Shear modulus decreases with increased oxidation time. Electrical resistance increases with increased oxidation time. An increase in the rate of change of the electrical resistance attributed to a change in the oxidation mechanism from preferential fiber bundle damage to matrix indicates that electrical resistance is a matrix-dominated property. A study of th relationships between electrical resistance, shear modulus, and mass loss measurements indicate that electrical resistance measurements may be used as a possible method of damage assessment of oxidation in carbon carbon.

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Document Details

Document Type
Technical Report
Publication Date
Nov 14, 1997
Accession Number
ADA332845

Entities

People

  • Ozden O. Ochoa

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Carbon Carbon Composites
  • Carbon Fibers
  • Ceramic Materials
  • Chemical Reactions
  • Chemical Vapor Deposition
  • Composite Materials
  • Electrical Properties
  • Electrical Resistance
  • Materials
  • Materials Processing
  • Materials Science
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Shear Modulus
  • Silicon Carbide
  • Two Dimensional

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Structural Health Monitoring of Composite Structures.
  • Thin Film Deposition Science.