Microstructural evolution mechanism of plain-woven SiC/SiC during thermal ablation. (November 2022)

• Record Type: Journal Article
• Authors: Du, Jinkang; Yu, Guoqiang; Zhang, Huajun; Jia, Yunfa; Chen, Ruixiang; Liu, Chenyang; Gao, Xiguang; Wang, Fang; Song, Yingdong
• Is Part Of: Corrosion science. Volume 208(2022)
• Publication Date: 2022-11
• Subjects: Ceramic matrix composites (CMCs) -- Microstructure formation mechanism -- Oxy-acetylene torch ablation -- Oxide-film constitution; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110679
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: The ablation characteristics of plain-woven SiC/SiC composites were investigated using an oxy-acetylene flame to reveal the failure process. The results showed that the linear ablation rate decreased linearly with time to 0.035 mm/s at 60 s of ablation. The ablation process of single SiC fibers resulted in the formation of a characteristic SiO2 broken porous tubular structure on the external surface. Due to the characteristics of the warp and weft weave structure of the material, resulting in the formation of "micro-pits" on the surface of the SiC fibers. Graphical Abstract: ga1 Highlights: The liner ablation rate of plain-woven SiC/SiC was 35 µm/s at 60 s of ablation. The SiC fiber ablation fracture showed needle-like structure. The SiO2 was attached to the fiber surface in 'ribbons' and 'skeletons'.