SiC/Si3N4 nano/micro-composite - processing, RT and HT mechanical properties

  • Autor:

    Sajgalik, P; Hnatko, M; Lofaj, F; Hvizdos, P; Dusza, J; Warbichler, P; Hofer, F; Riedel, R; Lecomte, E; Hoffmann, MJ

     
  • Quelle:

    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2000, Band 20, Heft 4, S. 453–462 

  • SiC/Si3N4 nano/micro-composite - processing, RT and HT mechanical properties.

Abstract

Two SiC/Si3N4 nano/micro composites were prepared from a starting mixture of crystalline alpha-Si3N4, amorphous SiNC, Y2O3 and/or Al2O3. The composite material for room temperature (RT) application has high strength of 1200 MPa, Weibull modulus of 19 and moderate fracture toughness of 7 MPa m(1/2). The composite for high temperature (HT) application, without Al2O3 has RT strength of 710 MPa and is able to keep 60% of its RT strength up to 1300 degrees C, The creep resistance of composite material is approx. 1 order higher compared to relative monolith up to 1400 degrees C.