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 ZrB 2 -SiC composites (C sf /ZrB 2 -SiC) overcoming the above tw...

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Bibliographic Details
Published in:Journal of advanced ceramics 2021-12, Vol.10 (6), p.1371-1380
Main Authors: Lu, Jun, Ni, Dewei, Liao, Chunjing, Zhou, Haijun, Jiang, Youlin, Chen, Bowen, Zou, Xuegang, Cai, Feiyan, Ding, Yusheng, Dong, Shaoming
Format: Article
Language:English
Subjects:
Bulk density
Carbon fibers
Ceramic fibers
Ceramic matrix composites
Ceramics
Characterization and Evaluation of Materials
Chemical vapor infiltration
Chemistry and Materials Science
Composites
Damage
Evolution
Fiber composites
Fiber pullout
Glass
Heat treating
Materials Science
Microstructure
Nanotechnology
Natural Materials
Optimization
Preforms
Refractory materials
Research Article
Short fibers
Structural Materials
Zirconium compounds
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Summary: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 ZrB 2 -SiC composites (C sf /ZrB 2 -SiC) overcoming the above two issues. At first, C sf 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, ZrB 2 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 C sf /ZrB 2 -SiC composites have a bulk density of 2.47 g/cm 3 , with uniform weak interphase and without serious fiber damage. Consequently, non-brittle fracture occurs in the C sf /ZrB 2 -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.
ISSN:2226-4108
2227-8508
DOI:10.1007/s40145-021-0512-z