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An Oxidation Resistant Al2O3-TiO2 Sintered Silicon Nitride

  • D. N. Ovreboe
  • S. K. Biswas
  • F. Castro
  • F. L. Riley
Chapter

Abstract

Silicon nitride has been hot-pressed and pressureless sintered using densification aids based on the Al2O3-SiO2-TiO2 system. Hot-pressing can be achieved satisfactorily at 1700 °C with an Al2O3-TiO2 ratio of 1:1; sintering at 1850 °C requires liquid phase compositions richer in Al2O3 and giving a transient ternary liquid at temperatures in the region of 1500 °C. Dense materials prepared in this system show good resistance to oxidation at temperatures up to 1500 °C.

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Copyright information

© Elsevier Science Publishers Ltd and MPA Stuttgart 1992

Authors and Affiliations

  • D. N. Ovreboe
    • 2
  • S. K. Biswas
    • 1
  • F. Castro
    • 3
  • F. L. Riley
    • 1
  1. 1.Division of Ceramics, School of MaterialsUniversity of LeedsLeedsUK
  2. 2.Norsk HydroPorsgrunnNorways
  3. 3.CEITSan SebastianSpain

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