TY - JOUR
T1 - Microstructure and mechanical properties of quasi-isotropic chopped fiber-reinforced PyC–SiC matrix composite prepared by novel nondamaging method
AU - Xu, Zeshui
AU - Ye, Fang
AU - Cheng, Laifei
AU - Song, Chaokun
AU - Guo, Chuchu
AU - Zhang, Qing
N1 - Publisher Copyright:
© 2021 Elsevier Ltd and Techna Group S.r.l.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - In this work, quasi-isotropic chopped carbon fiber-reinforced pyrolytic carbon and silicon carbide matrix (Cf/C–SiC) composites and chopped silicon carbide fiber-reinforced silicon carbide matrix (SiCf/SiC) composites were prepared via novel nondamaging method, namely airlaid process combined with chemical vapor infiltration. Both composites exhibit random fiber distribution and homogeneous pore size. Young's modulus of highly textured pyrolytic carbon (PyC) matrix is 23.01 ± 1.43 GPa, and that of SiC matrix composed of columnar crystals is 305.8 ± 9.49 GPa in Cf/C–SiC composites. Tensile strength and interlaminar shear strength of Cf/C–SiC composites are 52.56 ± 4.81 and 98.16 ± 24.62 MPa, respectively, which are both higher than those of SiCf/SiC composites because of appropriate interfacial shear strength and introduction of low-modulus and highly textured PyC matrix. Excellent mechanical properties of Cf/C–SiC composites, particularly regarding interlaminar shear strength, are due to their quasi-isotropic structure, interfacial debonding, interfacial sliding, and crack deflection. In addition to the occurrence of crack deflection at the fiber/matrix interface, crack deflection in Cf/C–SiC composites takes also place at the interface between PyC–SiC composite matrix and the interlamination of multilayered PyC matrix. Outstanding mechanical properties of as-prepared Cf/C–SiC composites render them potential candidates for application as thermal structure materials under complex stress conditions.
AB - In this work, quasi-isotropic chopped carbon fiber-reinforced pyrolytic carbon and silicon carbide matrix (Cf/C–SiC) composites and chopped silicon carbide fiber-reinforced silicon carbide matrix (SiCf/SiC) composites were prepared via novel nondamaging method, namely airlaid process combined with chemical vapor infiltration. Both composites exhibit random fiber distribution and homogeneous pore size. Young's modulus of highly textured pyrolytic carbon (PyC) matrix is 23.01 ± 1.43 GPa, and that of SiC matrix composed of columnar crystals is 305.8 ± 9.49 GPa in Cf/C–SiC composites. Tensile strength and interlaminar shear strength of Cf/C–SiC composites are 52.56 ± 4.81 and 98.16 ± 24.62 MPa, respectively, which are both higher than those of SiCf/SiC composites because of appropriate interfacial shear strength and introduction of low-modulus and highly textured PyC matrix. Excellent mechanical properties of Cf/C–SiC composites, particularly regarding interlaminar shear strength, are due to their quasi-isotropic structure, interfacial debonding, interfacial sliding, and crack deflection. In addition to the occurrence of crack deflection at the fiber/matrix interface, crack deflection in Cf/C–SiC composites takes also place at the interface between PyC–SiC composite matrix and the interlamination of multilayered PyC matrix. Outstanding mechanical properties of as-prepared Cf/C–SiC composites render them potential candidates for application as thermal structure materials under complex stress conditions.
KW - Ceramic matrix composites
KW - Chopped fiber
KW - Composite matrix
KW - Mechanical properties
KW - Quasi-isotropic
UR - http://www.scopus.com/inward/record.url?scp=85122070168&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2021.12.146
DO - 10.1016/j.ceramint.2021.12.146
M3 - 文章
AN - SCOPUS:85122070168
SN - 0272-8842
VL - 48
SP - 9483
EP - 9494
JO - Ceramics International
JF - Ceramics International
IS - 7
ER -