Phase and microstructure evolution of Sc2O3-CeO2 -ZrO2ceramics in Na2SO4 + V2O5 molten salts

被引：10
|
作者：
Wang, Jinshuang [1 ]
Chen, Luyao [1 ]
Chen, Mengdi [1 ]
Wu, Yuyang [1 ]
Wang, Yinghui [1 ]
Yu, Yongsheng [1 ]
Sun, Junbin [2 ]
Liu, Bing [1 ]
Jing, Qiangshan [1 ]
机构：
[1] Xinyang Normal Univ, Henan Prov Key Lab Utilizat Nonmetall Mineral Sou, Xinyang 464000, Peoples R China
[2] Hengyang Normal Univ, Hunan Prov Univ Key Lab Funct Organometall Mat, Key Lab Funct Met Organ Cpds Hunan Prov, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2021年 / 47卷 / 16期
基金：
中国国家自然科学基金;
关键词：
ZrO2; Hot corrosion; Mineralization effect; Phase transformation; THERMAL BARRIER COATINGS; HOT CORROSION BEHAVIOR; CERIA-STABILIZED ZIRCONIA; MECHANICAL-PROPERTIES; PHYSICAL PROPERTIES; YTTRIA; YSZ; SCANDIA; SULFATE; CONDUCTIVITY;
D O I：
10.1016/j.ceramint.2021.05.010
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, the destabilization resistance of Sc2O3 and CeO2 co-stabilized ZrO2 (SCZ) ceramics was tested in Na2SO4 + V2O5 molten salts at 750 degrees C-1100 degrees C. The phase structure and microstructure evolution of the samples during the hot corrosion testing were analyzed with X-ray diffraction (XRD), Raman spectra, scanning electron microscopy (SEM), energy dispersive X-ray spectrum (EDS), and X-ray photoelectron spectroscopy (XPS). Results showed that the destabilization of SCZ ceramics at 750 degrees C was the result of the chemical reaction with V2O5 to produce m-ZrO2 and CeVO4, and little ScVO4 was detected in the Sc2O3-rich SCZ ceramics. The primary corrosion products at 900 degrees C and 1100 degrees C were CeO2 and m-ZrO2 due to the mineralization effect. The Sc2O3-rich SCZ ceramics exhibited excellent degradation resistance and phase stability owing to the enhanced bond strength and the decreased size misfit between Zr4+ and Sc3+. The destabilization mechanism of SCZ ceramic under hot corrosion was also discussed.
引用
收藏
页码：22965 / 22975
页数：11
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