Improving mechanical strength and thermal shock resistance of SiC/zinc aluminum silicate joint by electrophoretic deposited multi-walled carbon nanotubes

Lei Feng, Kezhi Li, Caifeng Zheng, Yewei Fu, Zhigang Zhao, Qiang Song

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Improving the SiC/zinc aluminum silicate (SiC/ZAS) interface was essential for increasing the mechanical strength of SiC/ZAS joints that were used to join carbon/carbon (C/C) composites and lithium aluminum silicate (LAS) glass ceramics. In this work, well-dispersed multi-walled carbon nanotubes (MWCNTs) were introduced at the SiC/ZAS interface in the joints by electrophoretic deposition, which changed the fracture feature of the bonded C/C-LAS from SiC/ZAS interface fracture to C/C fracture, resulting in significant improvements of the shear strength. Results showed that the average shear strength of the joints was increased by 94.8% after introducing MWCNTs, which was attributed to the obviously decreased micro-defects at the SiC/ZAS interface in the joints. MWCNT-reinforced joints also exhibited better thermal shock resistance evidenced by higher residual shear strengths than those of neat joints after thermal shock tests from 800 °C to room temperature and 1000 °C to room temperature, respectively, which was primarily attributed to the positive role of MWCNTs in alleviating thermal stress.

Original languageEnglish
Pages (from-to)417-423
Number of pages7
JournalMaterials and Design
Volume94
DOIs
StatePublished - 15 Mar 2016

Keywords

  • Carbon nanotube
  • Carbon/carbon composite
  • Electrophoretic deposition
  • Joining
  • Shear strength
  • Thermal shock resistance

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