Sintering, high temperature strength and oxidation resistance of liquid-phase-pressureless-sintered SiC–AlN ceramics with addition of rare-earth oxides

Autor:	Antonino Coglitore, Francesco Antolini, Emiliano Burresi, Leandro Beaulardi, Claudio Mingazzini, Giuseppe Magnani
Rok vydání:	2009
Předmět:	Materials science Specific weight Metallurgy Cationic polymerization Oxide Sintering chemistry.chemical_compound Flexural strength chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Grain boundary Ceramic Composite material Solid solution
Zdroj:	Journal of the European Ceramic Society. 29:2411-2417
ISSN:	0955-2219
Popis:	SiC–AlN composites can be pressureless sintered with the addition of rare-earth oxides (RE = Y, Yb, Er, Lu, Ho, Sm, Ce) and without protective powder bed. Sintered bodies showed high density (≥97% T.D.) and were mainly composed by 2H SiC–AlN solid solution with additive containing grain boundary phases. The high temperature strength and oxidation resistance of the composites were also investigated and correlated with the cationic radii of the oxide additives. The flexural strength at 1500 °C increased from 269 MPa to 587 MPa as direct consequence of the rare-earth cationic radius decrease. The specific weight gain during oxidation at 1500 °C for 200 h showed the same behaviour, decreasing from 12.60 mg/cm 2 to 3.13 mg/cm 2 .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d4a0ccf37e8202ae91798db108f86f77 https://doi.org/10.1016/j.jeurceramsoc.2008.12.020 Zobrazit plný text záznamu Full Text from ScienceDirect