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High-Entropy Ferroelastic Rare-earth Tantalate Thermal Barrier Coating Material: (Y0.2Dy0.2Sm0.2Yb0.2Er0.2)TaO4
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Jun WANG1, Xiaoyun CHONG1, Jing FENG1, Min ZHANG2, Yuan YANG2, Dongpo LI2, Zifan ZHAO1
Journal of the Chinese Ceramic Society | 2022, 50(6) : 1481 - 1488
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Journal of the Chinese Ceramic Society | 2022, 50(6): 1481-1488
• Research Articles •
High-Entropy Ferroelastic Rare-earth Tantalate Thermal Barrier Coating Material: (Y0.2Dy0.2Sm0.2Yb0.2Er0.2)TaO4
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Jun WANG1, Xiaoyun CHONG1, Jing FENG1, Min ZHANG2, Yuan YANG2, Dongpo LI2, Zifan ZHAO1
Affiliations
  • 1.Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
  • 2.Yunnan Copper Company Limited, Southwest Copper Branch, Kunming 650000, China

    • WANG Jun (1989-), male, Doctor candidate. E-mail:

About Author:

WANG Jun (1989-), male, Doctor candidate. E-mail:

Published: 2022-06-20 doi: 10.14062/j.issn.0454-5648.20220038
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The function of thermal barrier coating is to protect the hot components of advanced aero-engines from hot corrosion and ensures the hot components service in high-temperature environment safely. In general, a low thermal conductivity and a high fracture toughness are the key performance indexes for the selection of novel thermal barrier coating materials. In this work, a high-entropy rare-earth tantalate ceramic of (Y0.2Dy0.2Sm0.2Yb0.2Er0.2)TaO4 (i.e. (5RE0.2)TaO4) with the superior properties was synthesized via solid-state reaction. The results indicate that (5RE0.2)TaO4 exhibits a low thermal conductivity (i.e., 1.68 W·m-1·K-1@900 ℃) and a high thermal expansion coefficient (i.e., 10.0×10-6 K-1@1 200 ℃). (5RE0.2)TaO4 shows a high fracture toughness (i.e., 2.6 MPa·m1/2) and a low brittleness index (i.e., 2.1 μm-1/2) because of the unique ferroelastic toughening effect. In addition, (5RE0.2)TaO4 also has a promising application prospect as one of thermal barrier coating materials.

rare earth tantalate ceramics  /  high entropy ceramics  /  thermal barrier coating  /  ferroelastic toughening effect
汪俊, 种晓宇, 冯晶, 张敏, 杨渊, 李东坡, 赵子樊. 高熵铁弹性稀土钽酸盐热障涂层材料：(Y0.2Dy0.2Sm0.2Yb0.2Er0.2)TaO4. 硅酸盐学报, 2022 , 50 (6) : 1481 -1488 . DOI: 10.14062/j.issn.0454-5648.20220038
Jun WANG, Xiaoyun CHONG, Jing FENG, Min ZHANG, Yuan YANG, Dongpo LI, Zifan ZHAO. High-Entropy Ferroelastic Rare-earth Tantalate Thermal Barrier Coating Material: (Y0.2Dy0.2Sm0.2Yb0.2Er0.2)TaO4[J]. Journal of the Chinese Ceramic Society, 2022 , 50 (6) : 1481 -1488 . DOI: 10.14062/j.issn.0454-5648.20220038
Appendix
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Year 2022 volume 50 Issue 6
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Article Info
doi: 10.14062/j.issn.0454-5648.20220038
  • Receive Date：2022-01-13
  • Online Date：2026-10-22
  • Published：2022-06-20
Article Data
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History
  • Received：2022-01-13
  • Revised：2022-02-17
Funding
Affiliations
    1.Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
    2.Yunnan Copper Company Limited, Southwest Copper Branch, Kunming 650000, China

Corresponding:

ZHAO Zifan (1993-), male, Ph.D., Lecturer. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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