Synthesis and Property of High-Entropy Rare Earth Hafnate as Thermal/Environmental Barrier Coating Material

HU Wanpeng; ZHANG Guangheng; ZHANG Jie; WANG Jingyang

doi:10.16080/j.issn1671-833x.2023.01/02.053

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Synthesis and Property of High-Entropy Rare Earth Hafnate as Thermal/Environmental Barrier Coating Material

更新时间：2025-10-30

- Synthesis and Property of High-Entropy Rare Earth Hafnate as Thermal/Environmental Barrier Coating Material
- Aeronautical Manufacturing Technology Vol. 66, Issue 1/2, (2023)
- 作者机构：
  
  1. 中国科学院金属研究所沈阳材料科学国家研究中心,沈阳,110016
  2. 中国科学技术大学,沈阳,110016
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2023.01/02.053
  CLC：
- Published：2023
- 稿件说明：
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胡万鹏，张广珩，张洁，王京阳. 高熵稀土铪酸盐热障/ 环境障涂层材料的制备与性能研究[J]. 航空制造技术, 2023, 66(1/2): 53-60. HU Wanpeng, ZHANG Guangheng, ZHANG Jie, WANG Jingyang. Synthesis and Property of High-Entropy Rare Earth Hafnate as Thermal/Environmental Barrier Coating Material[J]. Aeronautical Manufacturing Technology, 2023, 66(1/2): 53-60.

HU Wanpeng, ZHANG Guangheng, ZHANG Jie, et al. Synthesis and Property of High-Entropy Rare Earth Hafnate as Thermal/Environmental Barrier Coating Material[J]. Aeronautical Manufacturing Technology, 2023, 66(1/2).
胡万鹏，张广珩，张洁，王京阳. 高熵稀土铪酸盐热障/ 环境障涂层材料的制备与性能研究[J]. 航空制造技术, 2023, 66(1/2): 53-60. HU Wanpeng, ZHANG Guangheng, ZHANG Jie, WANG Jingyang. Synthesis and Property of High-Entropy Rare Earth Hafnate as Thermal/Environmental Barrier Coating Material[J]. Aeronautical Manufacturing Technology, 2023, 66(1/2): 53-60. DOI： 10.16080/j.issn1671-833x.2023.01/02.053.

HU Wanpeng, ZHANG Guangheng, ZHANG Jie, et al. Synthesis and Property of High-Entropy Rare Earth Hafnate as Thermal/Environmental Barrier Coating Material[J]. Aeronautical Manufacturing Technology, 2023, 66(1/2). DOI： 10.16080/j.issn1671-833x.2023.01/02.053.

摘要

综合性能优异的热障/ 环境障涂层是先进航空发动机涡轮叶片等高温部件的关键热防护材料。本研究通过两步烧结法制备了高熵稀土铪酸盐（La

0.2

）

和（Yb

0.2

）

，系统研究了两种材料的力学、热学性能和CMAS 腐蚀性能。多主元高熵材料具有较低的热膨胀系数和热导率，其中（Yb

0.2

）

表现出比（La

0.2

）

更高的硬度和断裂韧性。1300 ℃下CMAS腐蚀结果表明，（La

0.2

）

与CMAS 的反应速率快，更容易析出磷灰石，对阻止CMAS 迅速渗透是有益的。高熵稀土铪酸盐材料具有优异的综合性能，在热障/ 环境障涂层领域具有良好的应用前景。

Abstract

Thermal/environmental barrier coating with optimized performance is critical for the application in advanced aero-engines. In this work

high-entropy rare-earth hafnates

（La

0.2

）

and（Yb

0.2

）

were prepared by a two-step sintering method. Mechanical properties

thermal properties and CMAS corrosion behavior of two materials were systematically investigated. （Yb

0.2

）

exhibits higher hardness and fracture toughness than that of (La0.2Gd0.2Ho0.2Er0.2Tm0.2)4Hf3O12. High-entropy hafnates demonstrate reduced coefficient of thermal expansion and thermal conductivity. When corroded at 1300 ℃

the reaction of（La

0.2

）

with molten CMAS is more severe and triggers the precipitation of apatite

which mitigates the infiltration of molten CMAS into thermal/environmental barrier coatings. The rare earth hafnate has been regarded as a promising thermal barrier coating material.

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