Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material

Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material

An entropy-stabilization strategy was applied to engineer a novel thermal insulating material by establishing a single-phase solid solution with the formula of (Y1/2Yb1/2)2(Ti1/3Zr1/3Hf1/3)2O7 (YYHEO). Structural analysis revealed that this material exceeded the typical substitutional solubility lim...

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Main Authors: Dowon Song, Taeseup Song, Ungyu Paik, Guanlin Lyu, Yeon-Gil Jung, Hak-Beom Jeon, Yoon-Suk Oh
Format: Article
Language:English
Published: Elsevier 2021-11-01
Series:Materials & Design
Subjects:
Entropy-stabilization
High-entropy oxide
Solid solution
Thermal properties
Mechanical properties
Online Access:http://www.sciencedirect.com/science/article/pii/S0264127521006146
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spelling doaj-e842e30d0103422fbad781a7c207123d2021-08-26T04:32:06ZengElsevierMaterials & Design0264-12752021-11-01210110059Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier materialDowon Song0Taeseup Song1Ungyu Paik2Guanlin Lyu3Yeon-Gil Jung4Hak-Beom Jeon5Yoon-Suk Oh6Department of Energy Engineering, Hanyang University, Seoul 133-791, Republic of KoreaDepartment of Energy Engineering, Hanyang University, Seoul 133-791, Republic of Korea; Corresponding authors.Department of Energy Engineering, Hanyang University, Seoul 133-791, Republic of KoreaSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 641-773, Republic of KoreaSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 641-773, Republic of Korea; Corresponding authors.Korea Institute of Ceramic Engineering and Technology, 3321 Gyeongchung Rd., Shindun-myeon, Gyeonggi-do 17303, Republic of KoreaKorea Institute of Ceramic Engineering and Technology, 3321 Gyeongchung Rd., Shindun-myeon, Gyeonggi-do 17303, Republic of KoreaAn entropy-stabilization strategy was applied to engineer a novel thermal insulating material by establishing a single-phase solid solution with the formula of (Y1/2Yb1/2)2(Ti1/3Zr1/3Hf1/3)2O7 (YYHEO). Structural analysis revealed that this material exceeded the typical substitutional solubility limit, even with a significant atomic size difference, where the conventional determination rule was defied. YYHEO exhibited a lower glass-like thermal conductivity due to its highly disordered crystal structure and the specific design strategy. The coefficient of thermal expansion and mechanical properties (e.g. elastic modulus and hardness) were comparable to conventional materials, suggesting that YYHEO is a promising candidate for application as a new thermal insulating material.http://www.sciencedirect.com/science/article/pii/S0264127521006146Entropy-stabilizationHigh-entropy oxideSolid solutionThermal propertiesMechanical properties
collection DOAJ
language English
format Article
sources DOAJ
author Dowon Song
Taeseup Song
Ungyu Paik
Guanlin Lyu
Yeon-Gil Jung
Hak-Beom Jeon
Yoon-Suk Oh
spellingShingle Dowon Song
Taeseup Song
Ungyu Paik
Guanlin Lyu
Yeon-Gil Jung
Hak-Beom Jeon
Yoon-Suk Oh
Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material
Materials & Design
Entropy-stabilization
High-entropy oxide
Solid solution
Thermal properties
Mechanical properties
author_facet Dowon Song
Taeseup Song
Ungyu Paik
Guanlin Lyu
Yeon-Gil Jung
Hak-Beom Jeon
Yoon-Suk Oh
author_sort Dowon Song
title Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material
title_short Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material
title_full Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material
title_fullStr Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material
title_full_unstemmed Glass-like thermal conductivity in mass-disordered high-entropy (Y, Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material
title_sort glass-like thermal conductivity in mass-disordered high-entropy (y, yb)2(ti, zr, hf)2o7 for thermal barrier material
publisher Elsevier
series Materials & Design
issn 0264-1275
publishDate 2021-11-01
description An entropy-stabilization strategy was applied to engineer a novel thermal insulating material by establishing a single-phase solid solution with the formula of (Y1/2Yb1/2)2(Ti1/3Zr1/3Hf1/3)2O7 (YYHEO). Structural analysis revealed that this material exceeded the typical substitutional solubility limit, even with a significant atomic size difference, where the conventional determination rule was defied. YYHEO exhibited a lower glass-like thermal conductivity due to its highly disordered crystal structure and the specific design strategy. The coefficient of thermal expansion and mechanical properties (e.g. elastic modulus and hardness) were comparable to conventional materials, suggesting that YYHEO is a promising candidate for application as a new thermal insulating material.
topic Entropy-stabilization
High-entropy oxide
Solid solution
Thermal properties
Mechanical properties
url http://www.sciencedirect.com/science/article/pii/S0264127521006146
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