Effect of thermal cycling on modulus and tensile strength of 3D needled C/SiC composite in controlled environments

Jingjiang Nie, Yongdong Xu, Junqiang Ma, Litong Zhang, Laifei Cheng, Xiaowei Yin

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

A needled C/SiC composite was subjected to thermal cycling with a temperature interval ranging from 700 to 1200 °C, in a pure Ar gas and a simulated air atmosphere. The change of the resonant frequencies was used to determine the reduction in the modulus of the composite. Results show that the modulus linearly decreased with increasing thermal cycles. And after thermal cycled in pure Ar and simulated air for 90 cycles, the residual tensile strengths were reduced by 46.2% and 66.5%, being caused by thermo-mismatch and combining effects of thermo-mismatch and oxidation, respectively.

Original languageEnglish
Pages (from-to)235-238
Number of pages4
JournalMaterials Science and Engineering: A
Volume497
Issue number1-2
DOIs
StatePublished - 15 Dec 2008

Keywords

  • CVI
  • Needled C/SiC composites
  • Resonant frequency
  • Tensile
  • Thermal cycling

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