Journal of Materials Engineering

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Research progress in preparation technology of SiC_f/SiC ceramic matrix composites

WANG Yanfei, LIU Rongjun, ZHANG Jin, DU Jinping, LI Duan

Journal of Materials Engineering, 2025, 53(4): 52-74. DOI: 10.11868/j.issn.1001-4381.2024.000144

Interphase type	Preparing method	Advantage	Disadvantage
Y₂Si₂O₇	Solid state reaction， sol-gel	Excellent resistance to high temperature water vapor	High requirements on the antioxidant properties of the fiber
LaPO₄	Sol-gel	Good compatibility with oxide （Nextel fiber）	The thermal expansion coefficient is much different from SiC； the existence form is related to oxygen partial pressure
CaWO₄	Sol-gel	High thermal stability	Calcium salt corrosion
ZrGeO₄	Sol-gel	High thermal stability
ZrSiO₄	Sol-gel	High thermal stability
MAX phases	CVD，EPD，molten salt reaction	High interlaminar bonding strength	CVD method will produce more by-products， and the molten salt reaction will damage the fiber

Table 2 Types， preparation method， and advantages and disadvantages of the new interfacial phase

Other figure/table from this article

Fig.1 Schematic diagram of the composition structure of SiC_f/SiC composites
Table 1 Melting point and CTE of several novel interfacial phases
Table 3 Comparison of different preparation techniques of SiC matrix
Fig.2 PIP process route
Table 4 Ceramic yield of SiC ceramic precursor polymer for PIP process
Table 5 Density and flexural strength of PIP SiC_f/SiC composites prepared by different precursor
Fig.3 CVI process route
Table 6 Mechanical properties of SiC_f/SiC prepared by CVI process
Fig.4 RMI process route
Table 7 Mechanical properties of SiC_f/SiC prepared by RMI process
Fig. 5 Two strategies for preparing ceramic matrix composites with high toughness and high damage tolerance（a）weak interface composite WICs formed by strong matrix prepared by RMI or CVI process and weak interface （typical layered interface）；（b）WMCs，a weak matrix composite material formed by the weak matrix prepared by PIP process and the strong interface（water-oxygen erosion resistance interface）
Table 8 Mechanical properties of SiC_f/SiC composites prepared by combined process
Fig.6 SiC_f/SiC composites prepared by hybrid CVI-PIP technique（a）critical CVI SiC deposition thickness；（b），（c）typical microstructure
Fig.7 XRD refinements of topcoat of Si bond layer/Ytterbium silicate surface layer EBCs at 1300℃，50%H₂O/50%O₂ simulated gas corrosion for different time^［114］（a）prepared state；（b）after 80 h corrosion；（c）after 160 h corrosion
Fig.8 Schematic diagram of the long-term corrosion failure model of Si bonding layer/ Ytterbium silicate surface layer EBCs at 1300 ℃，50%H₂O/50%O₂ simulated gas^［114］
Table 9 Application of SiC-based composites in aero engines^{［3，5，119-122］}
Fig.9 SiC_f/SiC composite rotor blades tested on the F414 engine^［122］

模态框（Modal）标题

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