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Microstructure, mechanical properties and oxidation resistance of C/C-SIC-ZRB2 composites

  • Ltd
  • Harbin Institute of Technology Shenzhen

Research output: Contribution to conferencePaperpeer-review

Abstract

To overcome the poor oxidation resistance of C/C composites, anti-oxidation SiC and ZrB2-SiC ceramics were introduced into C/C composites by chemical vapor infiltration (CVI) and precursor infiltration-pyrolysis (PIP). The microstructure, mechanical properties and oxidation resistance of C/C-SiC-ZrB2 composites were investigated. The ZrB2-SiC ceramic exhibits uniform dispersion and distribution in C/C composite. The C/C-SiC-ZrB2 composites pyrolyzed at 1500°C has the highest flexural strength (315 MPa) and fracture toughness (10.87 MPam1/2). The flexural strength, tensile strength and compressive strength increased with temperature. The C/C-SiC-ZrB2 composites exhibited low ablation characteristics in plasma ablation experiments, and the linear ablation rate was 3.67×10-3 mm/s. The composite material, which exhibited synergistic effect between toughening and oxidation resistance, has potential application in the field of hypersonic vehicle.

Original languageEnglish
StatePublished - 2019
Event22nd International Conference on Composite Materials, ICCM 2019 - Melbourne, Australia
Duration: 11 Aug 201916 Aug 2019

Conference

Conference22nd International Conference on Composite Materials, ICCM 2019
Country/TerritoryAustralia
CityMelbourne
Period11/08/1916/08/19

Keywords

  • Mechanical properties
  • Microstructure
  • Oxidation resistance
  • ZrB2

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