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

Preparation technology	Temperature/ ℃	Preparation period/d	Open porosity/%	Matrix characteristics	Type of fabricated component
PIP	1100-1200	30-45	10-20	Low crystallinity，porous， multi-microcrack	Large size and complex shape components with large thickness
CVI	1000-1100	90	10-15	High crystallinity	Thin-walled components with complex shapes
RMI	1600-1700	5	<5	Containing residual silicon	Complex shape

Preparation technology

Temperature/

℃

Preparation period/d

Open porosity/%

Matrix characteristics

Type of fabricated component

PIP

1100-1200

30-45

10-20

Low crystallinity，porous，

multi-microcrack

Large size and complex shape components with large thickness

CVI

1000-1100

10-15

High crystallinity

Thin-walled components with complex shapes

RMI

1600-1700

Containing residual silicon

Complex shape

Table 3 Comparison of different preparation techniques of SiC matrix

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

Figure/Table detail