A novel rapid fabrication method and in-situ densification mechanism for ceramic matrix composite

Yijun Zhang, Yifan Xue, Yu Liu*, Weijie Li*, Kaiqiang Liu, Weijian Han, Zhongwei Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The extensive application of ceramic matrix composites has always been limited due to the long-period and expensive process. Hence, this research introduces a rapid manufacturing method named as ViSfP-TiCOP (High Viscosity Solvent-free Precursor Combined Elemental Titanium Controlled Pyrolysis). The solvent-free precursor possesses high viscosity (30 °C, 106 mPa S) and wide molecular weight distribution (Mz/Mw = 3.3), accomplishing stable loading of inorganic fillers. Simultaneously, the elementary titanium and ZrB2, as the active and inert filler, are dopped into the precursor to control the pyrolysis. The ViSfP-TiCOP technique offers a rapid method to manufacture CMCs under pressureless and low pyrolysis temperature conditions (1200 °C). Comparing to the addition of ZrB2, the precursor with titanium provides an exceptional ceramic yield of 87 wt%, leading a notable enhancement in the rate of densification. This high densification efficiency is attributed to an in-situ titanium gas-phase reaction, besides with the high degree of cross-linking and low volatile of precursor. After undergoing three cycles of impregnation-pyrolysis, the porosity of C/SiBCN–Ti was discovered to be below 10 vol%, whereas that of C/SiBCN-25 wt%ZrB2 still remained as high as 20.91 vol%. The ViSfP-TiCOP technology can provide guidance for low-cost and rapid preparation of CMCs.

Original languageEnglish
Article number111881
JournalComposites Part B: Engineering
Volume288
DOIs
Publication statusPublished - 1 Jan 2025

Keywords

  • A
  • A: prepreg
  • Active filler controlled pyrolysis
  • B
  • Ceramic matrix composites
  • Viscosity

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