Mechanical Properties of Silicon Oxycarbide Ceramic Foams

Paolo Colombo, John R. Hellmann, David L. Shelleman

Research output: Contribution to journalArticlepeer-review

122 Scopus citations

Abstract

The mechanical properties of ceramic foams obtained through a novel process that uses the direct foaming and pyrolysis of preceramic polymer/polyurethane solutions were investigated. The elastic modulus, flexural strength, and compressive strengths were obtained for foams in the as-pyrolyzed condition; values up to 7.1 GPa, 13 MPa, and 11 MPa, respectively, were obtained. The strength of the foam was virtually unchanged at temperatures up to 1200°C in air; however, long-term exposure at 1200°C led to a moderate degradation in strength, which was attributed to the evolution of intrastrut porosity during the oxidation of residual free carbon, as well as devitrification of the foams struts.

Original languageEnglish (US)
Pages (from-to)2245-2251
Number of pages7
JournalJournal of the American Ceramic Society
Volume84
Issue number10
DOIs
StatePublished - Oct 2001

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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