Preparation and mechanical properties of SiC-AlN ceramic alloy
- 128 Downloads
Fine-grained SiC-AlN ceramic alloys were synthesized by the reaction of silicon nitride and aluminium nitride powders with additions of carbon and CaO. X-ray diffraction and STEM-EDX analysis showed that they are single phase solid solutions. The SiC-AlN alloys were sintered without additives to full density by hot isostatic pressing at 2173 K and 200 MPa for 2 h. The flexural strength, microhardness and fracture toughness were measured and it was found that SiC-AlN alloys have double the strength and slightly higher fracture toughnesses than conventional monolithic SiC.
KeywordsFracture Toughness Flexural Strength Silicon Nitride Full Density Aluminium Nitride Powder
Unable to display preview. Download preview PDF.
- 1.F. Thümmler, in “Sintering processes”, Materials Science Research, Vol. 13, edited by G. C. Kuczynski (Plenum, New York and London, 1980) p. 247.Google Scholar
- 8.M. M. Dobson, in “Silicon Carbide Alloy”, Research Reports in Materials Science, Series One, edited by P. E. Evans (Parthenon, UK, 1986) p. 86.Google Scholar