Preparation of enhanced erosive wear resistance SiC-fiber-reinforced SiC ceramic matrix composites integrated with a knit fabric via high-temperature crystallization of amorphous Si-C-O-Al fibers

被引：0
作者：
Shimoda, Kazuya [1 ]
Kakisawa, Hideki [1 ]
机构：
[1] Natl Inst Mat Sci, Res Ctr Struct Mat, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
来源：
CERAMICS INTERNATIONAL | 2025年 / 51卷 / 05期
关键词：
Silicon carbide; SiC/SiC CMCs; Microstructure; Mechanical properties; Erosion resistance; MECHANICAL-PROPERTIES; OXIDATION BEHAVIOR; SIC/SIC COMPOSITES; STACKING-FAULTS; MICROSTRUCTURE; DENSIFICATION; INTERFACE; ROUTE;
D O I：
10.1016/j.ceramint.2024.12.064
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report the enhanced erosive wear resistance of SiC/SiC ceramic matrix composites (CMCs) integrated with a knit fabric via high-temperature crystallization of relatively cost-effective first-generation (amorphous) Si-C-O-Al fibers (AM; short for TyrannoTM AM), desingned for use as a sliding component. A pyrocarbon (PyC) interface was formed via dip coating in liquid phenolic resin, and matrix densification was achieved by hot pressing at 1900 degrees C for 1 h at 30 MPa. The PyC-coated AM fibers exhibited low tensile strength values at temperatures below 1600 degrees C, which increased significantly at 1900 degrees C (2.68 +/- 0.74 GPa). The hot-pressed AMSiC/SiC CMCs exhibited typical quasi-ductile fracture in a three-point bending test. The erosive wear of the CMCs was investigated using a slurry erosion test, and the associated mechanism was clarified by laser-microscopy- based 3D profiling and scanning-electron-microscopy-based microstructural examination. The matrix of the hot-pressed AM-SiC/SiC CMCs was dense (1.99 % porosity), rigidly structured, and hard (27.1 +/- 2.91 GPa), enabling the CMCs to outperform conventional SiC/SiC CMCs in terms of slurry erosion resistance.
引用
收藏
页码：6206 / 6219
页数：14
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