TY - JOUR
T1 - Optimizing the mechanical properties of Si3N4f/Si3N4 composites by tailoring the BN interphase structure
AU - Xu, Zeshui
AU - Guo, Chuchu
AU - Meng, Nan
AU - Zhou, Jie
AU - Li, Zhaochen
AU - Ye, Fang
AU - Cheng, Laifei
N1 - Publisher Copyright:
Copyright © 2026. Published by Elsevier Ltd.
PY - 2026/9
Y1 - 2026/9
N2 - Two-dimensional (2D) silicon nitride fiber-reinforced silicon nitride (Si3N4f/Si3N4) composites were fabricated with four types of boron nitride (BN) interphases: in situ BN (i-BN), chemical vapor infiltration BN (CVI-BN), and two of their combinations. The microstructure and thickness of these interphases were characterized, and their effects on the mechanical properties of the composites were investigated. The composites incorporating i-BN with a 2-cycle CVI-BN interphase (iBN-2CVIBN) exhibited optimal mechanical properties, with corresponding flexural strength, fracture toughness, and tensile strength of 187 ± 23 MPa, 6.1 ± 0.6 MPa·m1/2, and 77 ± 7 MPa, respectively. The interfacial shear strength and mechanical stability of the BN interphase were analyzed. Finally, the mechanism by which the BN interphase structure affects the mechanical properties of Si3N4f/Si3N4 composites was discussed in depth from the perspective of residual stress. This work provides novel insights for designing high-performance Si3N4f/Si3N4 composites.
AB - Two-dimensional (2D) silicon nitride fiber-reinforced silicon nitride (Si3N4f/Si3N4) composites were fabricated with four types of boron nitride (BN) interphases: in situ BN (i-BN), chemical vapor infiltration BN (CVI-BN), and two of their combinations. The microstructure and thickness of these interphases were characterized, and their effects on the mechanical properties of the composites were investigated. The composites incorporating i-BN with a 2-cycle CVI-BN interphase (iBN-2CVIBN) exhibited optimal mechanical properties, with corresponding flexural strength, fracture toughness, and tensile strength of 187 ± 23 MPa, 6.1 ± 0.6 MPa·m1/2, and 77 ± 7 MPa, respectively. The interfacial shear strength and mechanical stability of the BN interphase were analyzed. Finally, the mechanism by which the BN interphase structure affects the mechanical properties of Si3N4f/Si3N4 composites was discussed in depth from the perspective of residual stress. This work provides novel insights for designing high-performance Si3N4f/Si3N4 composites.
KW - BN interphase structure
KW - Mechanical properties
KW - Residual stress
KW - SiN/SiN composites
UR - https://www.scopus.com/pages/publications/105034203208
U2 - 10.1016/j.jeurceramsoc.2026.118357
DO - 10.1016/j.jeurceramsoc.2026.118357
M3 - 文章
AN - SCOPUS:105034203208
SN - 0955-2219
VL - 46
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 11
M1 - 118357
ER -