The improvement in the mechanical and thermal properties of SiC/SiC composites by introducing CNTs into the PyC interface

Wei Feng, Litong Zhang, Yongsheng Liu, Xiaoqiang Li, Laifei Cheng, Shanlin Zhou, Hui Bai

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Carbon nanotubes (CNTs) were introduced into the interface of SiC/SiC composites via electrophoretic deposition to improve their mechanical and thermal properties. SiC/SiC composites with pyrocarbon (PyC) and CNTs-PyC interfaces were denoted as SiC/SiC-P and SiC/SiC-CP, respectively. The results show that the flexural strength, fracture energy, interfacial shear strength and thermal conductivity increased upon the introduction of CNTs (SiC/SiC-CP) and were 1.174, 1.257, more than 2, and 2.158 times those of SiC/SiC-P, respectively. It was demonstrated that meshed CNTs on SiC fibres can strengthen the interfacial bonding between the fibre and matrix and improve the thermal conductivity of the interface. The meshed CNTs had positive effects on the mechanical and thermal properties of the SiC/SiC composites.

Original languageEnglish
Pages (from-to)123-129
Number of pages7
JournalMaterials Science and Engineering: A
Volume637
DOIs
StatePublished - 8 Jun 2015

Keywords

  • CNTs
  • Interface
  • Mechanical property
  • SiC/SiC composites
  • Thermal conductivity

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