caa a22 4500 463226380 CHVBK 20180405153228.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10853-007-1679-6 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1679-6 Correlation between fracture toughness and microstructure of seeded silicon nitride ceramics [Elektronische Daten] [D. Bučevac, S. Bošković, B. Matović, Lj. Živković, M. Vlajić, Vladimir Krstić] Microstructure development and fracture toughness of Si3N4 composites were studied in the presence of seeds and Al2O3+Y2O3 as sintering aids. The elongated β-Si3N4 seeds were introduced into two different α-Si3N4 matrix powders; one was the ultra fine powder matrix and the other was the coarse powder matrix. The amount of seeds varied from 0 to 6wt%. The grain growth inhibition and the mechanism of toughening were discussed and correlated with microstructure. The maximum fracture toughness of 9.0MPam1/2 was obtained for ultra fine powder with 5wt% seeds hot pressed at 1,700°C for 6h. Springer Science+Business Media, LLC, 2007 Bučevac D. Institute of Nuclear Sciences Vinča, 11001, Belgrade, Serbia and Montenegro aut Bošković S. Institute of Nuclear Sciences Vinča, 11001, Belgrade, Serbia and Montenegro aut Matović B. Institute of Nuclear Sciences Vinča, 11001, Belgrade, Serbia and Montenegro aut Živković Lj Faculty of Electronic Engineering, University of Niš, Nis, Serbia and Montenegro aut Vlajić M. Centre for Manufacturing of Advanced Ceramics and Nanomaterials, Queens University, Kingston, ON, Canada aut Krstić Vladimir Centre for Manufacturing of Advanced Ceramics and Nanomaterials, Queens University, Kingston, ON, Canada aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/18(2007-09-01), 7920-7926 0022-2461 42:18<7920 2007 42 10853 https://doi.org/10.1007/s10853-007-1679-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1679-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bučevac D. Institute of Nuclear Sciences Vinča, 11001, Belgrade, Serbia and Montenegro aut NATIONALLICENCE 700 1- Bošković S. Institute of Nuclear Sciences Vinča, 11001, Belgrade, Serbia and Montenegro aut NATIONALLICENCE 700 1- Matović B. Institute of Nuclear Sciences Vinča, 11001, Belgrade, Serbia and Montenegro aut NATIONALLICENCE 700 1- Živković Lj Faculty of Electronic Engineering, University of Niš, Nis, Serbia and Montenegro aut NATIONALLICENCE 700 1- Vlajić M. Centre for Manufacturing of Advanced Ceramics and Nanomaterials, Queens University, Kingston, ON, Canada aut NATIONALLICENCE 700 1- Krstić Vladimir Centre for Manufacturing of Advanced Ceramics and Nanomaterials, Queens University, Kingston, ON, Canada aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/18(2007-09-01), 7920-7926 0022-2461 42:18<7920 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer