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Characterization of Zirconium Diboride-Molybdenum Disilicide Ceramics

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Abstract

The microstructure and properties of zirconium diboride-molybdenum disilicide ceramics were studied. Up to thirty volume percent molybdenum disilicide was incorporated into zirconium diboride. The density, microstructure, mechanical properties, and oxidation resistance were characterized as a function of composition. Molybdenum disilicide was investigated as an additive to zirconium diboride due to its ability to form a protective oxide layer that might impart improved oxidation resistance to the ceramic. The results were compared to a previous examination of zirconium diboride-silicon carbide ceramics.

Keywords

  • Hypersonic reentry vehicles
  • Space shuttle orbiter
  • Thermal protection systems (TPS)
  • Characterization
  • Elastic moduli
  • Microstructure
  • Molybdenum compounds
  • Oxidation resistance
  • Scanning electron microscopy
  • Space shuttles
  • Zirconium compounds
  • Ceramic materials

Disciplines

  • Materials Science and Engineering

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