TY - JOUR
T1 - High-temperature mechanical properties of SiC-Mo5(Si, Al)3C composites
AU - Zhu, Q.
AU - Shobu, K.
PY - 2001
Y1 - 2001
N2 - SiC-Mo5(Si,Al)3C composites were fabricated by the melt infiltration process, and the infiltration characteristics were studied in detail. Fracture strength and toughness were measured up to 1600°C using a three-point bending test and indentation strength method, respectively. Both fracture strength and toughness significantly increased at 1400°C with respect to the values at room temperature. These increases were mainly attributed to plastic deformation of the infiltrated Mo5(Si,Al)3C phases at elevated temperatures, which acted as ductile toughening inclusions. Compressive creep tests were used to study the creep behavior of the composite in the range of 1550°-1650°C and 150-200 MPa. The stress exponent and activation energy were 1.3 and 277 kJ/mol, respectively. Preliminary oxidation tests showed that the composites exhibited good oxidation resistance at 1500°C because of the formation of a dense oxide scale.
AB - SiC-Mo5(Si,Al)3C composites were fabricated by the melt infiltration process, and the infiltration characteristics were studied in detail. Fracture strength and toughness were measured up to 1600°C using a three-point bending test and indentation strength method, respectively. Both fracture strength and toughness significantly increased at 1400°C with respect to the values at room temperature. These increases were mainly attributed to plastic deformation of the infiltrated Mo5(Si,Al)3C phases at elevated temperatures, which acted as ductile toughening inclusions. Compressive creep tests were used to study the creep behavior of the composite in the range of 1550°-1650°C and 150-200 MPa. The stress exponent and activation energy were 1.3 and 277 kJ/mol, respectively. Preliminary oxidation tests showed that the composites exhibited good oxidation resistance at 1500°C because of the formation of a dense oxide scale.
U2 - 10.1111/j.1151-2916.2001.tb00670.x
DO - 10.1111/j.1151-2916.2001.tb00670.x
M3 - Article
SN - 0002-7820
VL - 84
SP - 413
EP - 419
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 2
ER -