Paper Title:
Young’s Modulus and Poisson’s Ratio of Liquid Phase-Sintered Silicon Carbide
  Abstract

The compressive stress-strain relation (room temperature) of SiC compact (75 vol% 800 nm SiC- 25 vol% 30 nm SiC) hot-pressed with 1.6 vol% Al2O3- 0.83 vol% Gd2O3 at 1950 °C was examined at a crosshead speed of 0.05 mm/min. The dense SiC (97.8 ± 1.5 % theoretical density) possessed 796 MPa of average flexural strength, 5.27 MPa・m1/2 of fracture toughness, 8.1 of Weibull modulus, and 475 GPa of average flexural Young’s modulus. The strains of SiC compacts along directions of height and width changed nonlinearly with applied compressive stress. The apparent Young’s modulus and Poisson’s ratio decreased with increasing strain along the direction of height and reached constant values of 275 ± 59 GPa and 0.214 ± 0.05, respectively. The steady-state compressive Young’s modulus was independent of the flexural strength.

  Info
Periodical
Edited by
Takashi Goto, Yi-Bing Cheng and Takashi Akatsu
Pages
98-101
DOI
10.4028/www.scientific.net/KEM.484.98
Citation
Y. Okuzono, Y. Hirata, N. Matsunaga, S. Sameshima, "Young’s Modulus and Poisson’s Ratio of Liquid Phase-Sintered Silicon Carbide", Key Engineering Materials, Vol. 484, pp. 98-101, 2011
Online since
July 2011
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$32.00
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