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

2000; Elsevier BV; Volume: 20; Issue: 4 Linguagem: Inglês

10.1016/s0955-2219(99)00176-4

1873-619X

Pavol Šajgalı́k, Miroslav Hnatko, František Lofaj, Pavol Hvizdoš, Ján Dusza, Peter Warbichler, Ferdinand Hofer, Ralf Riedel, Emmanuel Lecomte, Michael J. Hoffmann,

Aluminum Alloys Composites Properties

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.