TY - JOUR
T1 - Generation mechanism of Si–Y–B-Yb ceramics with enhanced water-oxygen corrosion resistance
AU - Wang, Jing
AU - Mei, Xiaowei
AU - Zhang, Fan
AU - Liu, Yongsheng
AU - Wang, Dong
AU - Li, Jingxin
AU - Dong, Ning
N1 - Publisher Copyright:
© 2024 Elsevier Ltd and Techna Group S.r.l.
PY - 2024/11/1
Y1 - 2024/11/1
N2 - This study systematically investigates the influence of preparation temperature on microstructure and generation mechanism of Si–Y–B-Yb ceramics as anti-corrosion matrix. Main phases of Si–Y–B-Yb ceramics are Y/YbB4, YSi2, and Si, where Y/YbB4 is derived from the reaction between YSi2 and YbB6. With increase in preparation temperature, open porosity of Si–Y–B-Yb ceramics gradually decreases, reaching 0.24 % at 1350 °C, and internal phases transform from a dispersed distribution to clearly defined boundary state. Based on this, high-temperature water-oxygen corrosion behavior of Si–Y–B-Yb ceramics is characterized in 50 vol% H2O+50 vol% O2 environment at 1250 °C for 100 h. In this corrosive environment, silicate phase appears on the surface of Si–Y–B-Yb ceramics. With prolonged corrosion time, silicate phase gradually forms more complete protective layer, hindering further corrosion by water-oxygen environment. These results demonstrate the feasibility of proposed Si–Y–B-Yb materials for corrosion protection.
AB - This study systematically investigates the influence of preparation temperature on microstructure and generation mechanism of Si–Y–B-Yb ceramics as anti-corrosion matrix. Main phases of Si–Y–B-Yb ceramics are Y/YbB4, YSi2, and Si, where Y/YbB4 is derived from the reaction between YSi2 and YbB6. With increase in preparation temperature, open porosity of Si–Y–B-Yb ceramics gradually decreases, reaching 0.24 % at 1350 °C, and internal phases transform from a dispersed distribution to clearly defined boundary state. Based on this, high-temperature water-oxygen corrosion behavior of Si–Y–B-Yb ceramics is characterized in 50 vol% H2O+50 vol% O2 environment at 1250 °C for 100 h. In this corrosive environment, silicate phase appears on the surface of Si–Y–B-Yb ceramics. With prolonged corrosion time, silicate phase gradually forms more complete protective layer, hindering further corrosion by water-oxygen environment. These results demonstrate the feasibility of proposed Si–Y–B-Yb materials for corrosion protection.
KW - RE silicate
KW - Si-Y-B-Yb ceramics
KW - Water-oxygen corrosion
UR - http://www.scopus.com/inward/record.url?scp=85201295283&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2024.08.183
DO - 10.1016/j.ceramint.2024.08.183
M3 - 文章
AN - SCOPUS:85201295283
SN - 0272-8842
VL - 50
SP - 43289
EP - 43298
JO - Ceramics International
JF - Ceramics International
IS - 21
ER -