Research progress of rare-earth zirconate thermal barrier coatings

doi:10.3969/j.issn.1001-1935.2021.03.017

Abstract

Abstract:

The rare-earth zirconates were proposed as one of the most promising high-temperature thermal barrier materials as a result of a combination of many excellent properties,such as high temperature resistance,anti-sintering,low thermal conductivity,stable high-temperature phase structure and good corrosion resistance.The research progress of the crystal structure,physical properties,mechanical properties,thermal shock resistance and thermal corrosion resistance of the thermal barrier coating system was reviewed,and the development direction of these materials in the future was further prospected.

Key words: rare-earth zirconates, thermal barrier coating, crystal structure, thermal corrosion properties

摘要：

稀土锆酸盐热障涂层材料具有耐高温、抗烧结、低导热、高温相结构稳定和抗腐蚀性能好等优点,被认为是最具有潜力的新型高温热障涂层材料体系之一。概述了目前关于这种热障涂层材料体系的晶体结构、物理性能、力学性能、抗热震性以及热腐蚀性等的研究进展,并进一步展望了稀土锆酸盐热障涂层材料的发展方向。

关键词: 稀土锆酸盐, 热障涂层, 晶体结构, 热腐蚀性

CLC Number:

TB321

Li Di, Li Xiangcheng, Zhu Yingli, Chen Ping’an, Zhu Boquan. Research progress of rare-earth zirconate thermal barrier coatings[J]. Refractories, 2021, 55(3): 258-263.

李迪, 李享成, 朱颖丽, 陈平安, 朱伯铨. 稀土锆酸盐热障涂层材料的研究进展[J]. 耐火材料, 2021, 55(3): 258-263.

Figures/Tables 3

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原子	烧绿石结构 (Fd3m)	萤石结构 (Fm3m)	缺陷型萤石结构 (Fm3m)
L	16d	4a	16c或16d
Zr	16c	4a	16c或16d
O	48f	8c	48f、8a或8b
O'	8b	—	48f、8a或8b
Vo	8a	—	48f、8a或8b

原子	烧绿石结构 (Fd3m)	萤石结构 (Fm3m)	缺陷型萤石结构 (Fm3m)
L	16d	4a	16c或16d
Zr	16c	4a	16c或16d
O	48f	8c	48f、8a或8b
O'	8b	—	48f、8a或8b
Vo	8a	—	48f、8a或8b

材料	热导率/(W·m^-1·K^-1)	热膨胀系数×10⁶/K^-1
La₂Zr₂O₇	1.56(1 000 ℃)^[12]	9.1(1 000 ℃)^[12]
	1.30(1 100 ℃)^[13]	—
	1.15(1 450 ℃)^[14]	—
Nd₂Zr₂O₇	1.25(800 ℃)^[15]	9.5(800 ℃)^[15]
Sm₂Zr₂O₇	1.6(700 ℃)^[16]	—
Sm₂Zr₂O₇	1.5(1 100 ℃)^[17]	10.8(1 200 ℃)^[18]
Eu₂Zr₂O₇	1.60(1 100 ℃)^[17]	—
Gd₂Zr₂O₇	1.91(1 200 ℃)^[18]	11.6(1 200 ℃)^[18]
Dy₂Zr₂O₇	1.34(800 ℃)^[19]	11.1(1 200 ℃)^[20]
Er₂Zr₂O₇	1.49(800 ℃)^[19]	—
Yb₂Zr₂O₇	1.58(800 ℃)^[19]	—

材料	热导率/(W·m^-1·K^-1)	热膨胀系数×10⁶/K^-1
La₂Zr₂O₇	1.56(1 000 ℃)^[12]	9.1(1 000 ℃)^[12]
	1.30(1 100 ℃)^[13]	—
	1.15(1 450 ℃)^[14]	—
Nd₂Zr₂O₇	1.25(800 ℃)^[15]	9.5(800 ℃)^[15]
Sm₂Zr₂O₇	1.6(700 ℃)^[16]	—
Sm₂Zr₂O₇	1.5(1 100 ℃)^[17]	10.8(1 200 ℃)^[18]
Eu₂Zr₂O₇	1.60(1 100 ℃)^[17]	—
Gd₂Zr₂O₇	1.91(1 200 ℃)^[18]	11.6(1 200 ℃)^[18]
Dy₂Zr₂O₇	1.34(800 ℃)^[19]	11.1(1 200 ℃)^[20]
Er₂Zr₂O₇	1.49(800 ℃)^[19]	—
Yb₂Zr₂O₇	1.58(800 ℃)^[19]	—