TY - JOUR
T1 - Oxidation behavior of medium-entropy (Y1/3Yb1/3Lu1/3)2O3 modified SiC ceramic at 1700 °C
T2 - Experimental and theoretical study
AU - Xie, Wei
AU - Fu, Qiangang
AU - Cheng, Chunyu
AU - Zhang, Pei
AU - Yan, Ningning
N1 - Publisher Copyright:
© 2021
PY - 2021/9
Y1 - 2021/9
N2 - The medium-entropy oxide (Y1/3Yb1/3Lu1/3)2O3 with a body-centered cubic structure was successfully synthesized by solid-state reaction process, and then it was introduced into SiC ceramic to study its effect on the oxidation behavior of SiC ceramic at 1700 °C. The (Y1/3Yb1/3Lu1/3)2O3-modified SiC ceramic exhibited better oxidation resistance than its individual oxides (Y2O3, Yb2O3, and Lu2O3) modified SiC ceramic. The experimental and calculated results all indicate that the rare-earth atoms had the tendency to diffuse into the SiO2 structure and occupy the interstitial positions within SiO2 structure. The introduction of medium-entropy oxide (Y1/3Yb1/3Lu1/3)2O3 reduced the initial oxidation rate of the ceramic samples (1−3 h), and enhanced the stability of SiO2 structure, thus resulting in a better oxidation resistance at 1700 °C.
AB - The medium-entropy oxide (Y1/3Yb1/3Lu1/3)2O3 with a body-centered cubic structure was successfully synthesized by solid-state reaction process, and then it was introduced into SiC ceramic to study its effect on the oxidation behavior of SiC ceramic at 1700 °C. The (Y1/3Yb1/3Lu1/3)2O3-modified SiC ceramic exhibited better oxidation resistance than its individual oxides (Y2O3, Yb2O3, and Lu2O3) modified SiC ceramic. The experimental and calculated results all indicate that the rare-earth atoms had the tendency to diffuse into the SiO2 structure and occupy the interstitial positions within SiO2 structure. The introduction of medium-entropy oxide (Y1/3Yb1/3Lu1/3)2O3 reduced the initial oxidation rate of the ceramic samples (1−3 h), and enhanced the stability of SiO2 structure, thus resulting in a better oxidation resistance at 1700 °C.
KW - First-principles simulations
KW - Medium-entropy oxide
KW - Oxidation resistance
KW - SiC ceramic
UR - https://www.scopus.com/pages/publications/85106615355
U2 - 10.1016/j.jeurceramsoc.2021.05.042
DO - 10.1016/j.jeurceramsoc.2021.05.042
M3 - 文章
AN - SCOPUS:85106615355
SN - 0955-2219
VL - 41
SP - 5825
EP - 5834
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 12
ER -