Elastic-stiffness coefficients of a silicon carbide fibre at elevated temperatures: Acoustic spectroscopy and micromechanics modelling

H. Ogi, S. Kai, T. Ichitsubo, M. Hirao, K. Takashima

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We have determined all five independent elastic-stiffness coefficients Cij of a silicon carbide fibre with transverse isotropy from room temperature up to 873 K. Firstly, we measured the Cij of a titanium-alloy-matrix composite reinforced unidirectionally with the fibres and the matrix alloy alone. Electromagnetic acoustic resonance detected the free-vibration resonance frequencies of the specimens to determine their C ij. Secondly, we applied a micromechanics calculation to deduce the fibre Cij from the measured composite and matrix Cij. The resulting fibre Cij shows strong anisotropy in the temperature derivatives of the Cij; the temperature derivatives for the fibre-axis-direction Cij are much smaller than the others.

Original languageEnglish
Pages (from-to)503-512
Number of pages10
JournalPhilosophical Magazine
Volume83
Issue number4
DOIs
Publication statusPublished - 2003 Feb 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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