TY - JOUR
T1 - Corrosion of SiC/SiC composite in Na2SO4 vapor environments from 1000 to 1500 °C
AU - Wu, Shoujun
AU - Cheng, Laifei
AU - Zhang, Litong
AU - Xu, Yongdong
AU - Luan, Xingang
AU - Mei, Hui
PY - 2006/9
Y1 - 2006/9
N2 - Corrosion of a three-dimensional SiC/SiC composite with a CVD SiC coating was investigated in environments containing Na2SO4 vapor, oxygen and water vapor at temperatures from 1000 to 1500 °C. The corrosion behavior was greatly related to temperature. Below 1200 °C, the composite exhibited excellent resistance to corrosion, and then the residual flexural strength nearly kept the same value as the as-received strength. From 1200 to 1300 °C, the interaction of oxidation and corrosion led to a rapid weight gain. Above 1300 °C, weight loss due to volatilization and sublimation of Si(OH)4 and Na2O · xSiO2 on the surface increased continuously. At the same time, the gas release resulted in the formation of bubbles/corrosion pits and the maximum diameters of them increased with an increasing temperature. Additionally, above 1200 °C, with an increasing temperature, the residual flexural strength of the composite decreased greatly.
AB - Corrosion of a three-dimensional SiC/SiC composite with a CVD SiC coating was investigated in environments containing Na2SO4 vapor, oxygen and water vapor at temperatures from 1000 to 1500 °C. The corrosion behavior was greatly related to temperature. Below 1200 °C, the composite exhibited excellent resistance to corrosion, and then the residual flexural strength nearly kept the same value as the as-received strength. From 1200 to 1300 °C, the interaction of oxidation and corrosion led to a rapid weight gain. Above 1300 °C, weight loss due to volatilization and sublimation of Si(OH)4 and Na2O · xSiO2 on the surface increased continuously. At the same time, the gas release resulted in the formation of bubbles/corrosion pits and the maximum diameters of them increased with an increasing temperature. Additionally, above 1200 °C, with an increasing temperature, the residual flexural strength of the composite decreased greatly.
KW - A. 3D SiC/SiC composite
KW - A. NaSO
KW - B. Corrosion
UR - https://www.scopus.com/pages/publications/33746341517
U2 - 10.1016/j.compositesa.2005.07.010
DO - 10.1016/j.compositesa.2005.07.010
M3 - 文章
AN - SCOPUS:33746341517
SN - 1359-835X
VL - 37
SP - 1396
EP - 1401
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
IS - 9
ER -