TY - JOUR
T1 - Carbon fiber/SiC composites modified SiC nanowires with improved strength and toughness
AU - He, Fang
AU - Liu, Yongsheng
AU - Tian, Zhuo
AU - Zhang, Chengyu
AU - Ye, Fang
AU - Cheng, Laifei
AU - Zhang, Litong
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/9/12
Y1 - 2018/9/12
N2 - In this study, Cf/SiC composite was modified with SiC nanowires (SiCnws) grown in-situ in SiC matrix. Effects of SiCnw on bending strength and fracture toughness were investigated by comparison with conventional Cf/SiC. Results showed that SiCnw significantly improved both strength and fracture toughness of Cf/SiC. Compared to Cf/SiC, flexural strengths of Cf/SiC-SiCnw/PyC and Cf/SiC-SiCnw composites increased from 363.1 MPa to 375 MPa and 466.9 MPa, respectively. Bending strength and fracture toughness were estimated to 565 MPa and 20.30 MPa m1/2 for Cf/SiC containing SiCnw at high temperature (1000 °C), respectively. These values were 13.2% and 16.1% higher than that of conventional Cf/SiC. The latter was attributed to deflection, bridging, and pull-out of SiC nanowires to cracks. Improvements in mechanical properties of modified C/SiC composites were mainly attributed to deflection and bridging of SiC nanowires on cracks and pulling out of SiC nanowires from the matrix.
AB - In this study, Cf/SiC composite was modified with SiC nanowires (SiCnws) grown in-situ in SiC matrix. Effects of SiCnw on bending strength and fracture toughness were investigated by comparison with conventional Cf/SiC. Results showed that SiCnw significantly improved both strength and fracture toughness of Cf/SiC. Compared to Cf/SiC, flexural strengths of Cf/SiC-SiCnw/PyC and Cf/SiC-SiCnw composites increased from 363.1 MPa to 375 MPa and 466.9 MPa, respectively. Bending strength and fracture toughness were estimated to 565 MPa and 20.30 MPa m1/2 for Cf/SiC containing SiCnw at high temperature (1000 °C), respectively. These values were 13.2% and 16.1% higher than that of conventional Cf/SiC. The latter was attributed to deflection, bridging, and pull-out of SiC nanowires to cracks. Improvements in mechanical properties of modified C/SiC composites were mainly attributed to deflection and bridging of SiC nanowires on cracks and pulling out of SiC nanowires from the matrix.
KW - Carbon fiber/SiC composites
KW - SiC nanowires
KW - Toughening mechanism
UR - http://www.scopus.com/inward/record.url?scp=85051127828&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2018.08.005
DO - 10.1016/j.msea.2018.08.005
M3 - 文章
AN - SCOPUS:85051127828
SN - 0921-5093
VL - 734
SP - 374
EP - 384
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
ER -