掺CeO<sub>2</sub>稀土钽酸盐陶瓷材料的性能研究

doi:10.11896/cldb.24110106

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Abstract In order to meet the requirements of advanced aero engines for higher service temperature and better corrosion resistance of thermal barrier coatings, monochloric phase doped CeO₂ rare earth tantalate oxides were prepared by doping cerium oxide (CeO₂) in (Y_0.5Gd_0.5)TaO₄ material system with different doping ratios, and were held at 1 750 ℃ for 5 h by high temperature solid phase reaction.The thermodynamic pro-perties, microstructure and corrosion resistance of the material to CaO-MgO-Al₂O₃-SiO₂ (CMAS) were studied.The results show that: (ⅰ) Doped CeO₂ high entropy rare earth tantalate ceramic material has low thermal conductivity (1.55 W·m^-1·K^-1).(ⅱ) Doped CeO₂ high entropy rare earth tantalate ceramic material has ferroelastic phase transition, which helps to improve the fracture toughness of the material.(ⅲ) The low brittle-index (1.33 μm^-1/2) of the material increases the sample loss tolerance, impeding the deformation and crack propagation of the material.(ⅳ) Doped CeO₂ high-entropy rare earth tantalate material has excellent resistance to CMAS erosion.(ⅴ) Doped CeO₂ rare earth tantalate ceramic material is a new thermal barrier coating material with great application potential.

Key words： thermal barrier coating tantalate ceramic (Y_0.5Gd_0.5)TaO₄ CeO₂ doping thermic property mechanical property CMAS erosion resistance

Published: 25 January 2026 Online: 2026-01-27

CLC number:

TK265

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	Articles by authors
	LI Lingfeng
	SI Yaochen
	WANG Ruida
	LIU Guanghua
	ZHAO Shixian
	LI Hongxia
	LI Hongyu

Cite this article:

LI Lingfeng,SI Yaochen,WANG Ruida, et al. Study on Properties of CeO₂-doped Rare Earth Tantalate Ceramics[J]. Materials Reports, 2026, 40(2): 24110106-5.

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https://www.mater-rep.com/EN/10.11896/cldb.24110106 OR https://www.mater-rep.com/EN/Y2026/V40/I2/24110106

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