The mechanical performance of SiC/SiC composites is significantly influenced by the architecture of fiber reinforcement. Among the various fabrication methods, the nano-powder infiltration transition/eutectic (NITE) process is a promising technique that is capable of achieving a dense and stoichiometric SiC matrix. The reinforcement architecture, such as cross-ply (CP) or woven prepreg (WP), is determined during the preform stage of the NITE process, which is crucial in determining the mechanical properties of SiC/SiC composites. In this study, the tensile test and double notch shear (DNS) test were conducted using NITE-SiC/SiC composites to investigate the effect of the fiber reinforcing architecture on the fracture mechanism of SiC/SiC composites. The tensile strength and maximum shear strength of both CP and WP specimens were nearly identical. However, other mechanical properties, particularly those of CP specimens, exhibited significant variability. A comparison of fracture surfaces and load-displacement curve analyses from the DNS tests revealed that the cross points of the longitudinal or transverse fibers act as obstacles to both deformation and crack propagation. These obstacles were found to be more densely distributed in WP specimens than in CP specimens. The variability observed in the mechanical properties of CP specimens is likely due to size effects caused by the sparser distribution of these obstacles compared to the WP specimens.

1. Introduction 
3. Results and Discussion 
2. Experimental Procedure
    2.1. 재료
    2.2. 기계적 특성 평가
4. Conclusion 
Conflict of Interest Declaration  
Author Information and Contribution  
Acknowledgement
References

• 김종일(한국세라믹기술원 엔지니어링소재센터) | Jong-il Kim (Engineering Materials Center, Korea Institute of Ceramic Engineering & Technology, 3321, Gyeongchung-daero, Sindun-myeon, Icheon-si Gyeoggi-do, Republic of Korea) Corresponding author