Author/Authors :
?ajgal??k، نويسنده , , P. and Hnatko، نويسنده , , M. and Lofaj، نويسنده , , F. and Hvizdo?، نويسنده , , P. and Dusza، نويسنده , , J. and Warbichler، نويسنده , , P. and Hofer، نويسنده , , F. and Riedel، نويسنده , , R. and Lecomte، نويسنده , , E. de Hoffmann، نويسنده , , M.J.، نويسنده ,
Abstract :
Two SiC/Si3N4 nano/micro composites were prepared from a starting mixture of crystalline α-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 m1/2. 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°C. The creep resistance of composite material is approx. 1 order higher compared to relative monolith up to 1400°C.
Keywords :
mechanical properties , Creep , SiC , Composites , Si3N4
