Influence of CVI process time on the C-ring strength of hybrid SiCf/SiC composites fabricated by CVI–LSI

The C-ring strength behavior and the microstructural evolution of SiC f /SiC composite tubes fabricated using a hybrid method of chemical vapor infiltration (CVI) and liquid silicon infiltration (LSI) were investigated. The CVI and LSI composites were individually fabricated and compared with the pr...

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Bibliographic Details
Published in:Hanʼguk Seramik Hakhoe chi 2023, 60(2), 405, pp.261-271
Main Authors: Han, Jangwon, Kim, Daejong, Kim, Se-young, Kim, Weon-Ju, Park, Chan, Park, Ji Yeon
Format: Article
Language:English
Subjects:
Ceramics
Chemistry and Materials Science
Composites
Glass
Materials Science
Natural Materials
Original Article
재료공학
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Summary:The C-ring strength behavior and the microstructural evolution of SiC f /SiC composite tubes fabricated using a hybrid method of chemical vapor infiltration (CVI) and liquid silicon infiltration (LSI) were investigated. The CVI and LSI composites were individually fabricated and compared with the properties of hybrid composites. The additional LSI process improved the mechanical strength and density of the composites. The short CVI time composites had sufficient inter-bundle voids for densification, but free Si and carbon prepreg remained in the microstructure. The hybrid composites saw C-ring strength increase by 30–50% in the short CVI time composites, and the density was improved versus the properties of a single CVI or LSI process. This work can provide guidance for the optimization of processing SiC f /SiC hybrid composites and mechanical properties in the structural design of ceramic matrix composites.
ISSN:1229-7801
2234-0491
2334-0491
DOI:10.1007/s43207-022-00260-7