Glass-like thermal conductivity in mass-disordered high-entropy (Y,Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material
- Title
- Glass-like thermal conductivity in mass-disordered high-entropy (Y,Yb)2(Ti, Zr, Hf)2O7 for thermal barrier material
- Author
- 백운규
- Keywords
- Entropy-stabilization; High-entropy oxide; Mechanical properties; Solid solution; Thermal properties
- Issue Date
- 2021-11
- Publisher
- ELSEVIER SCI LTD
- Citation
- MATERIALS & DESIGN, v. 210, article no. 110059
- Abstract
- 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. © 2021
- URI
- https://www.sciencedirect.com/science/article/pii/S0264127521006146?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/178349
- ISSN
- 0264-1275;1873-4197
- DOI
- 10.1016/j.matdes.2021.110059
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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