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Fabrication and microstructure evolution of Csf/ZrB2-SiC composites via direct ink writing and reactive melt infiltration


Fiber damage and uniform interphase preparation are the main challenges in conventional short fiber reinforced ceramic matrix composites. In this work, we develop a novel processing route in fabrication of short carbon fiber reinforced ZrB2-SiC composites (Csf/ZrB2-SiC) overcoming the above two issues. At first, Csf preforms with oriented designation and uniform PyC/SiC interphase are fabricated via direct ink writing (DIW) of short carbon fiber paste followed by chemical vapor infiltration. After that, ZrB2 and SiC are introduced into the preforms by slurry impregnation and reactive melt infiltration, respectively. Microstructure evolution and optimization of the composites during fabrication are investigated in detail. The as-fabricated Csf/ZrB2-SiC composites have a bulk density of 2.47 g/cm3, with uniform weak interphase and without serious fiber damage. Consequently, non-brittle fracture occurs in the Csf/ZrB2-SiC composites with widespread toughening mechanisms such as crack deflection and bridging, interphase debonding, and fiber pull-out. This work provides a new opportunity to the material design and selection of short fiber reinforced composites.


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The financial support from the Key Research Program of Frontier Sciences, CAS (No. QYZDY-SSW-JSC031), the projects supported by State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology (No. 2021-KF-5), and State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University (No. KF2116) are greatly acknowledged.

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Correspondence to Dewei Ni, Yusheng Ding or Shaoming Dong.

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Lu, J., Ni, D., Liao, C. et al. Fabrication and microstructure evolution of Csf/ZrB2-SiC composites via direct ink writing and reactive melt infiltration. J Adv Ceram 10, 1371–1380 (2021).

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  • short fiber reinforced composites
  • ultra-high temperature ceramics (UHTCs)
  • interphase
  • orientation