Dominant mechanisms of thermo-mechanical properties of weberite-type RE3TaO7 (RE=La, Pr, Nd, Eu, Gd, Dy) tantalates toward multifunctional thermal/environmental barrier coating applications

Chen, Lin; Hu, Mingyu; Wang, Jiankun; Li, Baihui; Feng, Jing

doi:10.1016/j.actamat.2024.119857

Acta Materialia

2024

DOI: 10.1016/j.actamat.2024.119857

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Dominant mechanisms of thermo-mechanical properties of weberite-type RE3TaO7 (RE=La, Pr, Nd, Eu, Gd, Dy) tantalates toward multifunctional thermal/environmental barrier coating applications

Lin Chen,

Mingyu Hu,

Jiankun Wang

et al.

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Cited by 12 publications

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Thermal Shielding Gd₃TaO₇‐Based Thermal Barrier Ceramic with Ultralow NIR Transmittance

Xie,

Chen,

Wang

et al. 2024

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Most thermal barrier coating materials exhibit transparent/semi‐transparent properties at higher temperatures, causing the surface heat flow to directly heat the substrate with infrared radiation, which significantly reduces the thermal barrier effectiveness. Herein, composite ceramic materials composed of GdFeO3 diffusely dispersed within the Gd3TaO7 are produced. Specifically, the 0.9Gd3TaO7/0.1GdFeO3 composition demonstrates an ultra‐low near‐infrared (NIR) transmittance of less than 0.1% across the 400–2500 nm range. The introduction of variable‐valence behavior and oxygen vacancies contribute to the narrow bandgap of GdFeO3. The incorporated GdFeO3 produces extra multimode vibrations, resulting in the strong infrared emissivity of Gd3TaO7/GdFeO3 composite ceramics. Besides, the refractive index difference between Gd3TaO7 and GdFeO3 can contribute to the potential photons scattering within the composites, severely impeding the infrared radiation penetration. The upward curvature of the thermal conductivity curve of 0.9Gd3TaO7/0.1GdFeO3 at high temperature is significantly suppressed, confirming its excellent IR radiation shielding properties. Moreover, the Gd3TaO7/ GdFeO3 composite ceramic exhibits thermal suitability, with a thermal expansion coefficient (9.47–9.67 × 10−6 K−1 at 1400 °C) comparable to YSZ. These combined benefits position the Gd3TaO7/ GdFeO3 composite ceramic system as a promising candidate for the development of infrared radiation shielding and high‐emissivity thermal radiation materials.

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Thermal Shielding Gd₃TaO₇‐Based Thermal Barrier Ceramic with Ultralow NIR Transmittance

Xie,

Chen,

Wang

et al. 2024

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Oxygen ion diffusion in RE3TaO7: Why long-range migration of O2− is prohibited in the defective-fluorite structure?

Ren,

Zhang,

Che

et al. 2024

Acta Materialia

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Uncovering dominant mechanisms of nano-mechanical properties of AlTaO4 ceramics from structural characteristics

Wang,

Chen,

et al. 2024

Ceramics International

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Dominant mechanisms of thermo-mechanical properties of weberite-type RE3TaO7 (RE=La, Pr, Nd, Eu, Gd, Dy) tantalates toward multifunctional thermal/environmental barrier coating applications

Cited by 12 publications

References 87 publications

Thermal Shielding Gd₃TaO₇‐Based Thermal Barrier Ceramic with Ultralow NIR Transmittance

Thermal Shielding Gd₃TaO₇‐Based Thermal Barrier Ceramic with Ultralow NIR Transmittance

Oxygen ion diffusion in RE3TaO7: Why long-range migration of O2− is prohibited in the defective-fluorite structure?

Uncovering dominant mechanisms of nano-mechanical properties of AlTaO4 ceramics from structural characteristics

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Dominant mechanisms of thermo-mechanical properties of weberite-type RE3TaO7 (RE=La, Pr, Nd, Eu, Gd, Dy) tantalates toward multifunctional thermal/environmental barrier coating applications

Cited by 12 publications

References 87 publications

Thermal Shielding Gd3TaO7‐Based Thermal Barrier Ceramic with Ultralow NIR Transmittance

Thermal Shielding Gd3TaO7‐Based Thermal Barrier Ceramic with Ultralow NIR Transmittance

Oxygen ion diffusion in RE3TaO7: Why long-range migration of O2− is prohibited in the defective-fluorite structure?

Uncovering dominant mechanisms of nano-mechanical properties of AlTaO4 ceramics from structural characteristics

Contact Info

Product

Resources

About

Thermal Shielding Gd₃TaO₇‐Based Thermal Barrier Ceramic with Ultralow NIR Transmittance

Thermal Shielding Gd₃TaO₇‐Based Thermal Barrier Ceramic with Ultralow NIR Transmittance