Young's Modulus of Ceramics at Elevated Temperature (Part 1)

Abstract

The test technique for measuring Young's modulus for ceramics at elevated temperature was studied. (1) Test technique for measuring Young's modulus at elevated temperature was developed by using the impact sound. (2) The eigenvalues increased monotonically with an increase in slenderness ratio. The difference in eigenvalues due to the slenderness ratio, was more remarkable in higher modes. The eigenvalues were not affected by the Poisson's ratio. (3) The Young's modulus of the SiC and Si₃N₄ did not depend upon the elevated temperature. The Young's modulus of Al₂O₃, AlN, ZrO₂, CrC and TiN decreased with an increase in temperature. The Young's modulus of the composite ceramics Si₃N₄/BN increased slightly with increasing temperature.