稀土氧化物掺杂对YSZ热障涂层热物理性能影响的研究进展

doi:10.11896/cldb.22040242

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Abstract With the increase in the service temperature of aero engines and gas turbines, thermal barrier coatings (TBCs) are most widely used in the surface protection of hot section components of two engines. There are some problems with yttria stabilized zirconia (YSZ) of ceramic layer material such as phase transformation at elevated temperature, mismatch between the thermal expansion coefficient and metal substrates, and increase in the thermal conductivity of coatings caused by sintering, which seriously affects the service life of TBCs. The new generation of TBCs materials are divided into the following categories:(i) rare earth oxides to stabilize YSZ; (ii) ceramic materials of perovskite structure; (iii) rare-earth hexaaluminates or rare-earth tantalates; (iv) pyrochlore or fluorite structured rare earth zirconates. Among them, rare earth oxides doping can effectively reduce the thermal conductivity of YSZ thermal barrier coatings and improve their thermal expansion coefficient, high temperature phase stability and sintering resistance, which is an effective method to improve the high temperature stability of YSZ thermal barrier coatings. Therefore, the main purpose of this paper is to focus on the research progress of unit or multi-element rare earth oxides doped YSZ thermal barrier coatings, the mechanism of the effect of rare earth oxides doping on the properties of high temperature phase stability, thermal conductivity and thermal expansion coefficient of YSZ top coatings is discussed. The coupling-based mechanism provides some implications for the future development of rare earth oxides doped YSZ thermal barrier coatings.

Key words： thermal barrier coating doping mechanism thermal conductivity thermal expansion coefficient phase transition behavior

Published: Online: 2023-12-19

CLC number:

TG148

Fund:National Natural Science Foundation of China (52175163).

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	Articles by authors
	LIU Dianchao
	JIN Guo
	JING Yongzhi
	CUI Xiufang
	FANG Yongchao
	CHEN Zhuo
	WANG Xinhe

Cite this article:

LIU Dianchao,JIN Guo,JING Yongzhi, et al. Research Progress on the Effects of Rare Earth Oxides Doping on Thermophysical Properties of YSZ Thermal Barrier Coatings[J]. Materials Reports, 2023, 37(24): 22040242-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22040242 OR http://www.mater-rep.com/EN/Y2023/V37/I24/22040242

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