Fabrication and Galvanic Protection of Carbon Zirconia Composites

Abstract

It has been demonstrated that it is feasible to form a dense, pore- free coating of yttria stabilized zirconia on a porous graphite substrate by electrochemical vapor deposition. It appears that under appropriate conditions the structural integrity of the composite may be retained during slow heating and cooling, in spite of the gross mismatch in the thermal expansion coefficients of the coating and substrate. It is hypothesized that the thermal expansion difference is accommodated in the tetragonal zirconia phase by the preferential alignment of the c-axis along the pinacoidal direction closest to the interfacial plane via a displacive transformation during cooling.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1991
Accession Number
ADA251487

Entities

People

  • Gerald P. Wirtz

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Coatings
  • Composite Materials
  • Dielectric Gases
  • Engineering
  • Graphitic Materials
  • High Temperature
  • Materials
  • Materials Engineering
  • Materials Processing
  • Materials Science
  • Oxidation
  • Oxide Films
  • Structural Integrity
  • Structural Properties
  • Substrates
  • Thermal Expansion
  • Vapor Deposition

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.
  • Reinforced Composite Materials