Oxidation behavior of medium-entropy (Y1/3Yb1/3Lu1/3)2O3 modified SiC ceramic at 1700 °C: Experimental and theoretical study

Wei Xie; Qiangang Fu; Chunyu Cheng; Pei Zhang; Ningning Yan

doi:10.1016/j.jeurceramsoc.2021.05.042

Oxidation behavior of medium-entropy (Y_1/3Yb_1/3Lu_1/3)₂O₃ modified SiC ceramic at 1700 °C: Experimental and theoretical study

Wei Xie, Qiangang Fu, Chunyu Cheng, Pei Zhang, Ningning Yan

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The medium-entropy oxide (Y_1/3Yb_1/3Lu_1/3)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 (Y_1/3Yb_1/3Lu_1/3)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 (Y_1/3Yb_1/3Lu_1/3)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.

Original language	English
Pages (from-to)	5825-5834
Number of pages	10
Journal	Journal of the European Ceramic Society
Volume	41
Issue number	12
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2021.05.042
State	Published - Sep 2021

Keywords

First-principles simulations
Medium-entropy oxide
Oxidation resistance
SiC ceramic

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title = "Oxidation behavior of medium-entropy (Y1/3Yb1/3Lu1/3)2O3 modified SiC ceramic at 1700 °C: Experimental and theoretical study",

abstract = "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.",

keywords = "First-principles simulations, Medium-entropy oxide, Oxidation resistance, SiC ceramic",

author = "Wei Xie and Qiangang Fu and Chunyu Cheng and Pei Zhang and Ningning Yan",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

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doi = "10.1016/j.jeurceramsoc.2021.05.042",

language = "英语",

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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

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

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M3 - 文章

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JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 12

ER -

Oxidation behavior of medium-entropy (Y_1/3Yb_1/3Lu_1/3)₂O₃ modified SiC ceramic at 1700 °C: Experimental and theoretical study

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