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Fabrication and microstructure evolution of Csf/ZrB2-SiC composites via direct ink writing and reactive melt infiltration
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Fabrication and microstructure evolution of Csf/ZrB2-SiC composites via direct ink writing and reactive melt infiltration
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Journal Article
Fabrication and microstructure evolution of Csf/ZrB2-SiC composites via direct ink writing and reactive melt infiltration
2021
Overview
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.
Publisher
Tsinghua University Press,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310000,China,Structural Ceramics and Composites Engineering Research Center,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China%State Key Laboratory of High Performance Ceramics&Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China,Structural Ceramics and Composites Engineering Research Center,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China,State Key Laboratory of High Performance Ceramics&Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China,University of Chinese Academy of Sciences,Beijing 100049,China%State Key Laboratory of High Performance Ceramics&Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China
