A novel (Ho0.2Er0.2Tm0.2Yb0.2Lu0.2)2Zr2O7 high-entropy ceramic with excellent CMAS corrosion resistance for thermal barrier coatings

Corrosion Science, Год журнала: 2025, Номер 250, С. 112904 - 112904

Опубликована: Апрель 2, 2025

Язык: Английский

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(Gd1/7Dy1/7Ho1/7Er1/7Tm1/7Yb1/7Lu1/7)2Si2O7高熵稀土 双硅酸盐: 一种极具应用潜力的环境障涂层材料

Science China Materials, Год журнала: 2024, Номер 67(8), С. 2694 - 2699

Опубликована: Июнь 25, 2024

Язык: Английский

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Improved thermal, mechanical, water vapor and CMAS corrosion resistance properties of high entropy rare earth (Yb0.2Ho0.2Er0.2Tm0.2Sc0.2)2SiO5 monosilicate

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Hot corrosion of (Yb0.5Y0.5)2Si2O7 and (Yb0.25Y0.25Er0.25Tm0.25)2Si2O7 by CMAS at 1300 °C and 1500 °C

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Understanding the CMAS corrosion behavior of high‐entropy (La_0.2Sm_0.2Er_0.2Y_0.2Yb_0.2)₂Ce₂O₇

Journal of the American Ceramic Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 27, 2025

Abstract Ceramic thermal barrier coating (TBC) materials are used to protect the superalloys from damage of harmful high‐temperature airflow and improve efficiency jet gas turbine engines. However, long‐term application TBC robustness these can be destroyed by aggressive calcium‐magnesium‐alumina‐silicate (CMAS) melt during service. Increasing configuration entropy material doping multiple principal components has become a research hotspot in design corrosion‐resistant opened an infinite space chemical composition, structure, properties. In this study, high‐entropy (La 0.2 Sm Er Y Yb ) 2 Ce O 7 was synthesized its CMAS corrosion behavior investigated experimental investigation first‐principles calculation. The effects increase configurational subsequent potential on Ce‐based fluorite oxides have been sufficiently investigated. By compared with control samples, possesses minimum infiltration depth melts denser reaction layer, indicating best resistance. resistance mechanism studied greater stability segregation CMAS/(La system, poor adsorption capacity for which leads weak ability melt; weakest interfacial at interface indicated smallest value Griffith rupture work least species migration oxide responsible enhanced Our reveals that increasing effective strategy enhance

Язык: Английский

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Study of Gd2O3-Doped La2(Zr0.7Ce0.3)2O7 Thermal Barriers for Coating Ceramic Materials for CMAS Resistance

Coatings, Год журнала: 2025, Номер 15(4), С. 483 - 483

Опубликована: Апрель 18, 2025

The stability of thermal barrier coating (TBC) materials during service is a prerequisite for the normal operation aircraft engines. high-temperature corrosion CaO–MgO–Al2O3–SiO2 (CMAS) an important factor that affects TBCs on turbine blades and causes premature engine failure. For traditional 6-8 YSZ, at temperatures more than 1200 °C, insulation performance significantly reduced, which makes it necessary to find new, alternative materials. La2Zr2O7 has good physical properties; addition Ce4+ improves its mechanical properties, while adding Gd2O3 resistance. Herein, studies (La1−xGdx)2(Zr0.7Ce0.3)2O7 (L-GZC) (x = 0, 0.3, 0.5, 0.7) ceramic TBC were conducted using CMAS glass 1250 °C. results indicate rapidly dissolves L-GZC separates (La, Gd)8Ca2(SiO4)6O2 apatite phase, ZrO2, other crystalline phases. These products form layer contact boundary, can inhibit further reactions. Among coatings examined, exhibits better resistance, penetration depth <200 μm after °C 5, 10, 20 h. failure mechanism potential risk also analyzed discussed. material resistance expected replace YSZ meet working requirements gas turbines

Язык: Английский

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Improved CMAS corrosion resistance of high-entropy rare-earth monosilicates by multicomponent synergistic effects

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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Investigation on CMAS corrosion resistance of Sc2O3-Y2O3 co-stabilized ZrO2 thermal barrier coating material by tunable design with Gd-doping

Corrosion Science, Год журнала: 2024, Номер unknown, С. 112653 - 112653

Опубликована: Дек. 1, 2024

Язык: Английский

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Full-scale insight into high-entropy ceramics from basic concepts, synthesis technologies, structural characteristics, and properties to application prospects

Journal of Materials Research and Technology, Год журнала: 2024, Номер 33, С. 398 - 430

Опубликована: Сен. 16, 2024

Язык: Английский

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High‐entropy (Ho_1/4Er_1/4Dy_1/4Gd_1/4)₂Si₂O₇: A promising thermal environmental barrier coating material

Journal of the American Ceramic Society, Год журнала: 2024, Номер unknown

Опубликована: Окт. 13, 2024

Abstract This work presents the exploration of a promising thermal environmental barrier coating material by engineering compositions (Ho 1/4 Er Dy X ) 2 Si O 7 high‐entropy rare‐earth disilicates (HERED‐X, = Gd, Tm, Yb, Lu, Sc, Y). Among all samples, as‐fabricated HERED‐Gd samples possess best CMAS corrosion resistance with rate 8.2 ± 0.14 µm h −1 at 1673 K, which is attributed to synergistic effects high chemical reactivity and good stability formed apatite in melt. Moreover, they demonstrate matched coefficient expansion (4.6 × 10 −6 K SiC f /SiC composites (4.5–5.5 low conductivity (1.89 W m room temperature).

Язык: Английский

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