TY - JOUR
T1 - PIP-SiC基体改性C/SiC复合材料的微观结构与强韧性
AU - Meng, Zhixin
AU - Zhou, Yingying
AU - Zhang, Yi
AU - Lu, Yuanyuan
AU - Cheng, Laifei
N1 - Publisher Copyright:
Copyright ©2020 Journal of Aeronautical Materials. All rights reserved.
PY - 2020/12
Y1 - 2020/12
N2 - The matrix of fiber bundle composite C/SiC was modified by the combination means of precursor infiltration and pyrolysis (PIP) and chemical vapor infiltration (CVI). The microstructure of SiC matrix fabricated by PIP (PIP-SiC), and the fracture morphologies of the unmodified and modified composites were observed. Meanwhile, the tensile properties of the unmodified and modified composites were tested. The results show that PIP-SiC matrix modification improves the modulus matching between the fiber and matrix of C/SiC composite, and effectively improves the strength, toughness and stability of C/SiC composite. The tensile strength of modified C/SiC composite is slightly higher than that of unmodified C/SiC composite. Furthermore, the Weibull modulus, elongation and fracture work of modified C/SiC composite are 22%, 28% and 20% higher than those of unmodified C/SiC composite, respectively. Meanwhile, the variation coefficient (CV) of tensile strength, elongation and fracture work of modified C/SiC composite is 15%, 12% and 5% lower than that of unmodified C/SiC composite.
AB - The matrix of fiber bundle composite C/SiC was modified by the combination means of precursor infiltration and pyrolysis (PIP) and chemical vapor infiltration (CVI). The microstructure of SiC matrix fabricated by PIP (PIP-SiC), and the fracture morphologies of the unmodified and modified composites were observed. Meanwhile, the tensile properties of the unmodified and modified composites were tested. The results show that PIP-SiC matrix modification improves the modulus matching between the fiber and matrix of C/SiC composite, and effectively improves the strength, toughness and stability of C/SiC composite. The tensile strength of modified C/SiC composite is slightly higher than that of unmodified C/SiC composite. Furthermore, the Weibull modulus, elongation and fracture work of modified C/SiC composite are 22%, 28% and 20% higher than those of unmodified C/SiC composite, respectively. Meanwhile, the variation coefficient (CV) of tensile strength, elongation and fracture work of modified C/SiC composite is 15%, 12% and 5% lower than that of unmodified C/SiC composite.
KW - C/SiC composite
KW - Matrix modification
KW - Precursor infiltration and pyrolysis
KW - Strength and toughness
UR - http://www.scopus.com/inward/record.url?scp=85098686068&partnerID=8YFLogxK
U2 - 10.11868/j.issn.1005-5053.2020.000032
DO - 10.11868/j.issn.1005-5053.2020.000032
M3 - 文章
AN - SCOPUS:85098686068
SN - 1005-5053
VL - 40
SP - 16
EP - 22
JO - Hangkong Cailiao Xuebao/Journal of Aeronautical Materials
JF - Hangkong Cailiao Xuebao/Journal of Aeronautical Materials
IS - 6
ER -