Double-layer coated Csf/SiC composite fabricated by LPBF/LSI with improved mechanical properties through fiber damage prevention and crack propagation inhibition

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-01-29 DOI:10.1016/j.jeurceramsoc.2025.117248

Ce Sun , Song Zhang , Zimian Xu , Junchao He , Lihong Wu , Dongsheng Gu , Meijun Yang , Peng Chen , Xiao Han , Lixia Yang , Kai Liu , Yusheng Shi

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引用次数: 0

Abstract

The C_sf/SiC composites are fabricated by Laser powder bed fusion/liquid silicon infiltration (LPBF/LSI). To prevent the C_sf from being eroded by molten Si, and optimize the interface between the fiber and matrix, a pyrolytic carbon-silicon carbide (PyC-SiC) double-coated layer is synthesized on the surface of C_sf. The SiC layer prevents the diffusion of molten Si, thereby shielding fibers from erosion. The PyC layer can form a weak bonding interface between the matrix and fibers, facilitating fiber extraction at crack tips during material fracture. The double-layer coating's dual action mechanism of fiber damage prevention and crack propagation inhibition significantly enhances the strength and fracture toughness of C_sf/SiC composites. C_sf/SiC composites with double-layer coated fibers exhibit a maximum bending strength of 257.11 MPa and a maximum fracture toughness of 3.60 MPa·m^1/2, marking respective improvements of 8.51 % and 16.12 % compared to the C_sf/SiC composites with original fibers.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.