Ablative and Mechanical Properties of C/C-ZrC Composites Prepared byPrecursor Infiltration and Pyrolysis Process

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Abstract

C/C-ZrC composites with continuous ZrC matrix were prepared by precursor infiltration and pyrolysis process using zirconium-containing polymer. Ablation properties of the composites were investigated by oxyacetylene flame with heat flux of 2380 and 4180kW/m2, respectively. The results showed that C/C-ZrC composites exhibited excellent ablation resistance under the heat flux of 2380kW/m2 for 120s and a tree-coral-like ZrO2 protective layer formed after ablation. However, when the heat flux increased to 4180kW/m2, the maximum temperature of ablated surface reached 2500°C and a strong degradation of ablation resistance was observed due to the weak bonding between the formed ZrO2 layer and the composites. The flexural strength of C/C-ZrC composites was 110.7±7.5MPa. There were a large number of carbon fiber bundles pull-out, and the composites exhibited a pseudo-plastic fracture behavior.

Original languageEnglish
Pages (from-to)77-82
Number of pages6
JournalJournal of Materials Science and Technology
Volume31
Issue number1
DOIs
StatePublished - 2015

Keywords

  • Ablation performance
  • C/C composites
  • Ceramic-matrix composites
  • Mechanical properties

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