Sajgalik, Pavol ; Hnatko, M. ; Lofaj, F. ; Hvizdos, P. ; Dusza, J. ; Warbichler, P. ; Hofer, F. ; Riedel, Ralf ; Lecomte, E. (2000):
SiC/Si3N4 nano/micro-composite - processing, RT and HT mechanical properties.
In: Journal of the European Ceramic Society, 20 (4), pp. 453-462. Elsevier, [Article]
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2000 |
| Creators: | Sajgalik, Pavol ; Hnatko, M. ; Lofaj, F. ; Hvizdos, P. ; Dusza, J. ; Warbichler, P. ; Hofer, F. ; Riedel, Ralf ; Lecomte, E. |
| Title: | SiC/Si3N4 nano/micro-composite - processing, RT and HT mechanical properties |
| Language: | English |
| 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. |
| Journal or Publication Title: | Journal of the European Ceramic Society |
| Volume of the journal: | 20 |
| Issue Number: | 4 |
| Publisher: | Elsevier |
| Uncontrolled Keywords: | Creep, Mechanical properties, Composites, SiC, Si3N4 |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids |
| Date Deposited: | 19 Nov 2008 15:54 |
| PPN: | |
| Funders: | Present work was partly supported by Slovak Grant Agency VEGA, project 2/5118/99 and Slovak–Germany R&D Program, project X292.11., P. Šajgalı́k acknowledges also the Alexander von Humboldt Foundation for financial support during his stay at the University of Karlsruhe where a part of the mechanical properties were measured., P. Hvizdoš acknowledges the financial support of the British Council Academic Link “Silicon Nitride for High Temperature Structural Applications”., R. Riedel and E. Lecomte acknowledge the financial support of the European Community. |
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