TY - JOUR
T1 - Mechanical properties of 3D fiber reinforced C/SiC composites
AU - Xu, Yongdong
AU - Cheng, Laifei
AU - Zhang, Litong
AU - Yin, Hongfeng
AU - Yin, Xiaowei
PY - 2001/2/28
Y1 - 2001/2/28
N2 - High toughness and reliable three dimensional textile carbon fiber reinforced silicon carbide composites were fabricated by chemical vapor infiltration. Mechanical properties of the composite materials were investigated under bending, shear, and impact loading. The density of the composites was 2.0-2.1 g cm-3 after the three dimensional carbon preform was infiltrated for 30 h. The values of flexural strength were 441 MPa at room temperature, 450 MPa at 1300°C, and 447 MPa at 1600°C. At elevated temperatures (1300 and 1600°C), the failure behavior of the composites became some brittle because of the strong interfacial bonding caused by the mis-match of thermal expansion coefficients between fiber and matrix. The shear strength was 30.5 MPa. The fracture toughness and work of fracture were as high as 20.3 MPa m1/2 and 12.0 kJ·m-2, respectively. The composites exhibited excellent uniformity of strength and the Weibull modulus, m, was 23.3. The value of dynamic fracture toughness was 62 kJ·m-2 measured by Charpy impact tests.
AB - High toughness and reliable three dimensional textile carbon fiber reinforced silicon carbide composites were fabricated by chemical vapor infiltration. Mechanical properties of the composite materials were investigated under bending, shear, and impact loading. The density of the composites was 2.0-2.1 g cm-3 after the three dimensional carbon preform was infiltrated for 30 h. The values of flexural strength were 441 MPa at room temperature, 450 MPa at 1300°C, and 447 MPa at 1600°C. At elevated temperatures (1300 and 1600°C), the failure behavior of the composites became some brittle because of the strong interfacial bonding caused by the mis-match of thermal expansion coefficients between fiber and matrix. The shear strength was 30.5 MPa. The fracture toughness and work of fracture were as high as 20.3 MPa m1/2 and 12.0 kJ·m-2, respectively. The composites exhibited excellent uniformity of strength and the Weibull modulus, m, was 23.3. The value of dynamic fracture toughness was 62 kJ·m-2 measured by Charpy impact tests.
KW - 3D textile C/SiC composites
KW - Chemical vapor infiltration
KW - Reliability
KW - Toughness
UR - http://www.scopus.com/inward/record.url?scp=0035961246&partnerID=8YFLogxK
U2 - 10.1016/S0921-5093(00)01533-1
DO - 10.1016/S0921-5093(00)01533-1
M3 - 文章
AN - SCOPUS:0035961246
SN - 0921-5093
VL - 300
SP - 196
EP - 202
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
IS - 1-2
ER -