Mechanical, thermal and CMAS resistance properties of high-entropy (Gd0.2Y0.2Er0.2Tm0.2Yb0.2)2Zr2O7 ceramics

Yan, Rongxue; Liang, Wenping; Miao, Qiang; Zhao, Hui; Liu, Ruixiang; Li, Jingyuan; Zang, Kai; Dong, Meijing; He, Xiping; Gao, Xiguang; Yang, Song

doi:10.1016/j.ceramint.2023.03.205

Cited by 32 publications

(3 citation statements)

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“…Summary of recently reported representative data, along with data from this study, regarding the corrosion depth of EBC/TBC materials when exposed to molten CMAS. [3,[10][11][12][13][14][15][16][17][18][19][20]22,24,25,[38][39][40] blocks. CMAS powders were prepared using the solid-phase method, with a molar ratio of Ca 33 Mg 10 Al 13 Si 44 .…”

Section: Discussionmentioning

confidence: 99%

“…The corrosion layers on these materials measured merely 28.8 μm after 50 h and 35.4 μm after 100 h at 1500 °C. According to available literature, [3,[10][11][12][13][14][15][16][17][18][19][20]22,24,25,[38][39][40] these medium-entropy silicates show the slimmest corrosion thickness among comparable T/EBC materials under similar corrosion conditions, as demonstrated in Figure 9. The specific power output of a gas turbine engine increases proportionally with the inlet temperature.…”

Section: Factor For Apatite Growth Strainmentioning

confidence: 99%

“…[8,9,10] The thickness of corrosion products serves as a measure of a material's resistance to CMAS corrosion, where CMAS does not penetrate the coating material, a thinner corrosion layer signifies reduced material consumption. Rare earth materials like zirconate, [11,12,13] hafnate, [14,15] oxide, [16] and tantalate [17] exhibit superior performance as coating materials compared with traditional TBC materials, yttria-stabilized zirconia (YSZ), at 1300-1350 °C. However, the surface temperature of EBCs may increase to ≥1400 °C.…”

Section: Introductionmentioning

confidence: 99%

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Medium‐Entropy Monosilicates Deliver High Corrosion Resistance to Calcium‐Magnesium Aluminosilicate Molten Salt

Chen,

Wang,

Huang

et al. 2024

Advanced Science

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For decreasing the global cost of corrosion, it is essential to understand the intricate mechanisms of corrosion and enhance the corrosion resistance of materials. However, the ambiguity surrounding the dominant mechanism of calcium‐magnesium aluminosilicate (CMAS) molten salt corrosion in extreme environments hinders the mix‐and‐matching of the key rare earth elements for increasing the resistance of monosilicates against corrosion of CMAS. Herein, an approach based on correlated electron microscopy techniques combined with density functional theory calculations is presented to elucidate the complex interplay of competing mechanisms that control the corrosion of CMAS of monosilicates. These findings reveal a competition between thermodynamics and kinetics that relies on the temperatures and corrosion processes. Innovative medium‐entropy monosilicates with exceptional corrosion resistance even at 1500 °C are developed. This is achieved by precisely modulating the radii of rare earth ions in monosilicates to strike a delicate balance between the competition in thermodynamics and kinetics. After 50 and 100 h of corrosion, the thinnest reactive layers are measured to be only 28.8 and 35.4 µm, respectively.

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