TY - JOUR
T1 - Fracture behavior and mechanism of 2D C/SiC-BCx composite at room temperature
AU - Liu, Yongsheng
AU - Cheng, Laifei
AU - Zhang, Litong
AU - Yang, Wenbin
AU - Zhou, Shengtian
AU - Zhang, Weihua
PY - 2011/1/25
Y1 - 2011/1/25
N2 - 2D C/SiC composite was modified with partial BCx matrix by low pressure chemical vapor infiltration technique (LPCVI), which was named as 2D C/SiC-BCx composite. The flexural fracture behavior, mechanism, and strength distribution of 2D C/SiC-BCx composite are investigated. The results indicate that the flexural strength, fracture toughness, and fracture work are 442.1MPa, 22.84MPam1/2, and 19.2kJm-2, respectively. The flexural strength of C/SiC-BCx composite decrease about 20% than that of C/SiC composite. However, the fracture toughness and fracture work increase about 19% and 18.5%, respectively. The properties varieties between C/SiC-BCx composite and C/SiC composite can be attributed to the weak-bonding interface between BCx/SiC matrices according to the results of detailed microstructure analysis. The strength distribution of 2D C/SiC-BCx composite follows as Normal distribution or Weibull distribution with σu=0, and m=8.1393. The mean value of flexural strength for 2D C/SiC-BCx composite is 443MPa obtained by theory calculation, which is consistent with experiment result (442.1MPa) very well.
AB - 2D C/SiC composite was modified with partial BCx matrix by low pressure chemical vapor infiltration technique (LPCVI), which was named as 2D C/SiC-BCx composite. The flexural fracture behavior, mechanism, and strength distribution of 2D C/SiC-BCx composite are investigated. The results indicate that the flexural strength, fracture toughness, and fracture work are 442.1MPa, 22.84MPam1/2, and 19.2kJm-2, respectively. The flexural strength of C/SiC-BCx composite decrease about 20% than that of C/SiC composite. However, the fracture toughness and fracture work increase about 19% and 18.5%, respectively. The properties varieties between C/SiC-BCx composite and C/SiC composite can be attributed to the weak-bonding interface between BCx/SiC matrices according to the results of detailed microstructure analysis. The strength distribution of 2D C/SiC-BCx composite follows as Normal distribution or Weibull distribution with σu=0, and m=8.1393. The mean value of flexural strength for 2D C/SiC-BCx composite is 443MPa obtained by theory calculation, which is consistent with experiment result (442.1MPa) very well.
KW - Ceramic-matrix composites (CMCs)
KW - Chemical vapor infiltration (CVI)
KW - Fracture behavior
KW - Strength distribution
UR - http://www.scopus.com/inward/record.url?scp=78650168834&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2010.10.045
DO - 10.1016/j.msea.2010.10.045
M3 - 文章
AN - SCOPUS:78650168834
SN - 0921-5093
VL - 528
SP - 1436
EP - 1441
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
IS - 3
ER -