NDLI: Microstructure and Mechanical Properties of Rare-Earth Doped Si3N4/SiC Nanocomposites

Content Provider	IEEE Xplore Digital Library
Author	Tatarko, P. Dusza, J. Lojanová, S. Šajgalík, P.
Copyright Year	2009
Abstract	Influence of various rare-earth oxide sintering additives (La2O3, Y2O3, Yb2O3 and Lu2O3) on the microstructure and mechanical properties of hot-pressed Si3N4/SiC nanocomposites have been investigated. Fracture toughness of investigated materials slightly decreased with increasing ionic radius of rare-earth element (RE). Aspect ratio of the Si3N4 grains increased with decreasing ionic radius of rare-earth both in the studied Si3N4/SiC nanocomposites. Materials with higher aspect ratio of the Si3N4 grains exhibited crack deflection more frequently compared to the Si3N4 doped with lower aspect ratio, which was responsible for the higher fracture toughness. Flexural strength of the investigated materials increased with decreasing ionic radius of rare-earth elements. Significantly improved creep resistance was observed in case of nancomposite materials with smaller ionic radius of RE3+.
Starting Page	137
Ending Page	141
File Size	474590
Page Count	5
File Format	PDF
ISBN	9780769539386
e-ISBN	9781424456161
DOI	10.1109/ICMENS.2009.36
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-28
Publisher Place	United Arab Emirates
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Atomic measurements Si3N4 Additives Creep resistance Creep Mechanical factors Ceramics SiC Hardness Synthetic aperture sonar Rare-earth oxide additives Flexural Strength Silicon carbide Nanocomposites Fracture Toughness Microstructure Bonding
Content Type	Text
Resource Type	Article

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