Ye Fuxing, Song Ziqi, Meng Fanwei, Ali Sajid
Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.
Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin 300072, China.
Materials (Basel). 2025 Apr 13;18(8):1778. doi: 10.3390/ma18081778.
In this work, a novel potential thermal barrier coating material entropy-stabilized titanium-aluminum oxide (LaCeNdSm)TiAlO (META) was successfully synthesized by the solid-state reaction method, and its thermophysical properties, phase stability, infrared emissivity, mechanical properties, and CMAS corrosion resistance were systematically investigated. The results demonstrated that META exhibits low thermal conductivity at 1100 °C (1.84 W·(m·K)), with a thermal expansion coefficient (10.50 × 10 K, 1000-1100 °C) comparable to yttria-stabilized zirconia (YSZ). Furthermore, META displayed desirable thermal stability, high emissivity within the wavelength range of 2.5-10 μm, and improved mechanical properties. Finally, META offers superior corrosion resistance due to its excellent infiltration inhibiting. The bi-layer structure on the corrosion surface prevents the penetration of the molten CMAS. Additionally, doping small-radius rare-earth elements thermodynamically stabilizes the reaction layer. The results of this study indicate that (LaCeNdSm)TiAlO has the potential to be a promising candidate for thermal barrier coating materials.
在本工作中，通过固态反应法成功合成了一种新型潜在热障涂层材料熵稳定型钛铝氧化物（LaCeNdSm）TiAlO（META），并对其热物理性能、相稳定性、红外发射率、力学性能和CMAS耐腐蚀性进行了系统研究。结果表明，META在1100℃时表现出低导热率（1.84W·(m·K)），其热膨胀系数（10.50×10⁻⁶K⁻¹，1000 - 1100℃）与氧化钇稳定氧化锆（YSZ）相当。此外，META具有良好的热稳定性，在2.5 - 10μm波长范围内具有高发射率，且力学性能有所改善。最后，由于其优异的渗透抑制性能，META具有卓越的耐腐蚀性。腐蚀表面的双层结构可防止熔融CMAS的渗透。此外，掺杂小半径稀土元素在热力学上稳定了反应层。本研究结果表明，（LaCeNdSm）TiAlO有潜力成为一种有前景的热障涂层材料候选物。
