Modeling the Oxidation Kinetics of Continuous Carbon Fibers in a Ceramic Matrix.

Abstract

A finite difference model has been developed and was used to study the oxidation kinetics of carbon fibers exposed by the presence of a through-thickness matrix crack in a ceramic matrix composite. Air was the environment of interest so that the model could be compared to experimental testing. The limiting steps of diffusion controlled and reaction controlled kinetics were investigated by changing the value of the simulated temperature which, in turn corresponds to a change in the diffusion coefficient and reaction rate constant. The reaction rates for the oxidation of carbon fibers were compared to theoretical values and oxidation trends predicted by the model were compared to experimental trends.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2000
Accession Number
ADA373545

Entities

People

  • James D. Cawley
  • Michael C. Halbig

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Carbon Fibers
  • Ceramic Matrix Composites
  • Coefficients
  • Composite Materials
  • Databases
  • Diffusion Coefficient
  • Equations
  • Geometry
  • High Temperature
  • Materials
  • Military Research
  • Silicon Carbide
  • Space Sciences
  • Steady State
  • Technical Ceramics
  • Transition Temperature
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Computational Modeling and Simulation
  • Reinforced Composite Materials