Mechanical properties and calcium–magnesium–alumino–silicate corrosion behaviour of Ce/Gd co-doped SrZrO3 ceramics. Issue 21 (1st November 2022)

• Record Type: Journal Article
• Authors: Qi, Yingwei; Bai, Yu; Zhuang, Xin; Liu, Hongxia; Liu, Caiwen; Dong, Hongying; Geng, Qing; Wang, Wei; Ma, Wen
• Is Part Of: Ceramics international. Volume 48:Issue 21(2022)
• Page Start: 31790
• Page End: 31799
• Publication Date: 2022-11-01
• Subjects: SrZrO3 ceramic -- Rare-earth doping -- CMAS corrosion -- Mechanical properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.07.107
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Sr(Zr1-2x Cex Gdx )O3-0.5x (x = 0, 0.05, 0.1 and 0.15) ceramics were prepared by pressureless sintering using powders that were synthesized by solid-state reaction. The mechanical properties and calcium–magnesium–alumino–silicate (CMAS) early corrosion behaviour of the prepared ceramics were reported. The mechanical properties of rare-earth-doped SrZrO3 improved significantly. The reaction products of the Sr(Zr1-2x Cex Gdx )O3-0.5x ceramics after CMAS corrosion were similar: zirconia, SrAl2 O4, akermanite, and anorthite. The mechanism of CMAS corrosion resistance is summarized as follows: elemental Sr easily enters the CMAS melt, because of its high diffusivity, and promotes crystallization. Rare-earth elements can prevent melt infiltration because of their low diffusivity.