Variation of the lattice parameter and thermal expansion coefficient of (U,Dy)O2 as a function of DyO1.5 content |
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| Affiliation: | 1. Korea Atomic Energy Research Institute, P.O. Box 105, Yuseong, Daejeon 305-600, South Korea;2. Department of Materials Engineering, Chung-Nam National University, Daejeon 305-764, South Korea;1. Department of Materials Science and Engineering, Faculty of Mechanical Engineering, University of Tabriz, 29 Bahman Blvd., Tabriz, Iran;2. School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran;1. Institute for Frontier Materials, Deakin University, Geelong, VIC 3217, Australia;2. School of Computing, Engineering and Mathematics, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia;1. Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, Guangdong Province 510006, China;2. Key Laboratory of Surface Functional Structure Manufacturing of Guangdong Higher Education Institutes, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | Thermal expansions of (U,Dy)O2 solid solutions were investigated between room temperature and 1673 K by using a thermo-mechanical analyzer. The lattice parameter of (U,Dy)O2 pellets is lower than that of UO2 and it decreases as Dy content increases. The linear thermal expansion and average thermal expansion coefficients of (U,Dy)O2 are higher than that of UO2. For the temperature range from room temperature to 1673 K, the average thermal expansion coefficient values for UO2 and (U0.8Dy0.2)O2 are 10.97 × 10−6 and 11.37 × 10−6 K−1, respectively. |
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