• Preparation and characterization of silicon nitride-silicon carbide composites

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    • Keywords

       

      Silicon nitride-silicon carbide composites; modulus of rupture; coefficient of thermal expansion

    • Abstract

       

      Silicon nitride-silicon carbide (Si3N4-SiC) composites were prepared by varying the percentage of silicon nitride at temperatures of 1350 to 1450°C. The mechanical and thermal properties of these composites were determined. The modulus of rupture of the composites increases with increase of temperature whereas the thermal expansion decreases. Composites with 10% and 50% Si3N4 have modulus of rupture of 49 and 86 MPa at 1400°C and thermal expansion coefficients (25°–1000°C) of 4·4 × 10−6 and 3·2 × 10−6°C−1 respectively.

    • Author Affiliations

       

      N Kishan Reddy1 J Mukerji1 2

      1. Indian Institute of Chemical Technology, Hyderabad - 500 007, India
      2. Central Glass and Ceramic Research Institute, Calcutta - 700 032, India
    • Dates

       
  • Bulletin of Materials Science | News

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