Paper Title:
Mechanical and Thermal Properties of Silicon Nitride Hot Pressed with Adding Rare-Earth Oxides
  Abstract

Mechanical and thermal properties of Si3N4 ceramics with various rare-earth oxides (La2O3, CeO2, Lu2O3, Dy2O3, Sm2O3, Nd2O3, Yb2O3, and RuO2) were investigated. Flexural strength of silicon nitride with addition of 5vol% Nd2O3, CeO2, Dy2O3, and Sm2O3 showed higher value than that of silicon nitride with Lu2O3 and La2O3 added because they form denser microstructure and smaller elongated grain. Thermal conductivity of silicon nitride with an addition of 5vol% RuO2 was more enhanced than that of silicon nitride added with Nd2O3, Sm2O3, and Dy2O3 because the addition of RuO2 depressed grain growth. It is also associated with lattice oxygen governing thermal conductivity of Si3N4 when added rare-earth oxides.

  Info
Periodical
Materials Science Forum (Volumes 486-487)
Edited by
Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee
Pages
181-184
DOI
10.4028/www.scientific.net/MSF.486-487.181
Citation
D. H. Choi, B. K. Moon, R. J. Sung, S. H. Kim, K. Niihara, "Mechanical and Thermal Properties of Silicon Nitride Hot Pressed with Adding Rare-Earth Oxides", Materials Science Forum, Vols. 486-487, pp. 181-184, 2005
Online since
June 2005
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$32.00
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