TY - JOUR
T1 - Y/YbB4-modified SiCf/SiC composites with enhanced water-oxygen corrosion resistance
AU - Wang, Jing
AU - Zhang, Fan
AU - Liu, Yongsheng
AU - Li, Jingxin
AU - Dong, Ning
AU - Cao, Yejie
N1 - Publisher Copyright:
© 2023 Elsevier Ltd and Techna Group S.r.l.
PY - 2023/11/15
Y1 - 2023/11/15
N2 - Silicon carbide fibers-reinforced silicon carbide matrix (SiCf/SiC) composites, which are commonly used as thermal structural materials in different components, e.g., combustion chamber liners, are susceptible to water-oxygen corrosion, resulting in rapid performance degradation and structural collapse. To enhance their resistance to water-oxygen corrosion, the incorporation of rare-earth silicates (RE silicates) has been explored. In this study, novel Y/YbB4-modified SiCf/SiC composites, with superior resistance to water-oxygen corrosion, are fabricated using a combination of slurry infiltration (SI) and reactive melt infiltration (RMI) process. Results demonstrate that Y/YbB4-modified SiCf/SiC composites exhibit open porosity of 3.2 ± 0.4%, corresponding to remarkable reduction of 69.8% compared to CVI-SiCf/SiC composites. Furthermore, after being exposed to water-oxygen environment at 1200 °C for 100 h, the surface of Y/YbB4-modified SiCf/SiC composites displays various yttrium silicates and ytterbium silicates. The material exhibits strength retention of 76.84%, indicating a notable improvement of 15.71% over the CVI-SiCf/SiC composites.
AB - Silicon carbide fibers-reinforced silicon carbide matrix (SiCf/SiC) composites, which are commonly used as thermal structural materials in different components, e.g., combustion chamber liners, are susceptible to water-oxygen corrosion, resulting in rapid performance degradation and structural collapse. To enhance their resistance to water-oxygen corrosion, the incorporation of rare-earth silicates (RE silicates) has been explored. In this study, novel Y/YbB4-modified SiCf/SiC composites, with superior resistance to water-oxygen corrosion, are fabricated using a combination of slurry infiltration (SI) and reactive melt infiltration (RMI) process. Results demonstrate that Y/YbB4-modified SiCf/SiC composites exhibit open porosity of 3.2 ± 0.4%, corresponding to remarkable reduction of 69.8% compared to CVI-SiCf/SiC composites. Furthermore, after being exposed to water-oxygen environment at 1200 °C for 100 h, the surface of Y/YbB4-modified SiCf/SiC composites displays various yttrium silicates and ytterbium silicates. The material exhibits strength retention of 76.84%, indicating a notable improvement of 15.71% over the CVI-SiCf/SiC composites.
KW - RE silicate
KW - Water-oxygen corrosion
KW - Y/YbB-modified SiC/SiC composites
UR - http://www.scopus.com/inward/record.url?scp=85171991166&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2023.08.354
DO - 10.1016/j.ceramint.2023.08.354
M3 - Article
AN - SCOPUS:85171991166
SN - 0272-8842
VL - 49
SP - 37046
EP - 37050
JO - Ceramics International
JF - Ceramics International
IS - 22
ER -