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Journal of Materials Science

, Volume 32, Issue 15, pp 4025–4030 | Cite as

Dry and wet oxidation of an Si2N2O-ZrO composite material

  • M Heim
  • J Chen
  • R Pompe
Article

Abstract

The oxidation behaviour of a low-cost porous Si2N2O-ZrO2 composite material, produced without the use of a sintering aid, was investigated in dry and humid air and argon, respectively, in the temperature range 800–1470°C. The extent of internal oxidation in dry air was found to be dependent on the oxidation temperature. The material exhibits excellent oxidation resistance at temperatures ≥1300°C. A very thin layer containing zirconium silicate which is formed on the internal pore walls, appears to protect the material against further oxidation. External pore sealing was not observed. Water vapour was found to enhance oxidation significantly. It was also found that a short-term oxidation treatment at high temperature protects the material from further oxidation at lower temperatures. External pore closure did not occur.

Keywords

Open Porosity Internal Oxidation Internal Pore High Weight Gain Total Weight Gain 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • M Heim
    • 1
  • J Chen
    • 1
  • R Pompe
    • 2
  1. 1.Department of Inorganic ChemistryChalmers University of Technology and University of GoteborgGoteborgSweden
  2. 2.Swedish Ceramic InstituteGoteborgSweden

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