润滑科技信息平台

A Systematic Analysis of the Calcium-magnesium-aluminosilicate Corrosion Behavior of High-entropy (5Re0.2)2Si2O7 Materials

出版日期: 2023-04-27

DOI: https://doi.org/10.1016/j.corsci.2023.111221

作者: Fushuang Wei; Dongxing Zhang; Xue Gong; Yong Liu; Binxin Li; Peng Hao; Feifei Zhou; Baosheng Xu; Xiaodong Zhang; You Wang;

The CaO-MgO-AlO1.5-SiO2 (CMAS) corrosion resistance of disilicates is an urgent task in environmental barrier coatings. Based on this, four high-entropy rare earth disilicates (Yb0.2Y0.2Lu0.2Sc0.2Gd0.2)2Si2O7, (Yb0.2Tm0.2Lu0.2Sc0.2Gd0.2)2Si2O7, (Yb0.2Tm0.2Lu0.2Sc0.2Er0.2)2Si2O7, and (Yb0.2Y0.2Lu0.2Ho0.2Er0.2)2Si2O7 and single-component Yb2Si2O7 for comparison were investigated. Results showed that cyclosilicate Ca3RE2(Si3O9)2 and apatite Ca2RE8(SiO4)6O2 are formed sequentially at 1300℃ for 48 h, which can block the CMAS from infiltrating the ceramics. The corrosion resistance of the four high-entropy rare earth silicates varied depending on the average RE3+ radius, but all performed better than Yb2Si2O7.

全文链接: https://www.sciencedirect.com/science/article/pii/S0010938X23002639/pdfft?md5=36cffe349cfd04957ff5ec3b4c4a5dfd&pid=1-s2.0-S0010938X23002639-main.pdf

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