Irradiation-induced large bubble formation and grain growth in super nano-grained ceramic |
| |
| Affiliation: | 1. College of Physics, Sichuan University, Chengdu, 610064, China;2. Key Laboratory of Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu, 610064, China;3. Institute for Advanced Study, Chengdu University, Chengdu, 610106, China;4. Key Laboratory of High Energy Density Physics of Ministry of Education, Sichuan University, Chengdu, 610064, China;5. State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China;1. School of Materials Science and Engineering, Henan University of Science and Technology, China;2. Henan Key Laboratory of Materials Science & Processing Technology for Non-ferrous Metals, China;3. Collaborative Innovation Center of Nonferrous Metals, Henan Province, China;4. School of Materials Science and Energy Engineering, Foshan University, China;5. Division of Advanced Materials Engineering, Jeonbuk National University, Republic of Korea;1. Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Hachioji, Tokyo, 192-0015, Japan;2. Kyoto Municipal Institute of Industrial Technology and Culture, 91 Chudojiawatacho Kyoto Shimogyo-ku, Kyoto, 600-8815, Japan;1. School of Materials Science and Hydrogen Energy, Foshan University, Foshan, 528000, Guangdong, PR China;2. Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan, 528000, PR China;3. Guangdong Dowstone Technology Co., Ltd., Jiangmen, 529400, PR China |
| |
| Abstract: | In this work, 0.5TRPO•0.5Gd2Zr2O7 ceramic with an average grain size of only ∼15 nm was prepared by a high pressure (5 GPa/520 °C) sintering method. Phase evolutions and microstructure changes of the as-fabricated super nano and micron-grained ceramics under a high-dose displacement damage induced by 300 keV Kr2+ ions were investigated. The results show that the super nano-grained ceramic has low degree of amorphization, obvious grain growth (2–3 times in grain size) and big Kr bubbles (10–68 nm) formation after irradiation. The micron-grained ceramic was severely amorphized after irradiation and many microcracks were formed parallel to its surface. The formation mechanism of Kr bubbles in the super nano-grained ceramic is on account of grain boundary diffusion and migration induced by the accumulation of the injecting Kr ions and irradiation defects. Nevertheless, microcracks formed in the micron-grained sample are caused by the accumulation of Kr atoms. |
| |
| Keywords: | Nanograin ceramic Nuclear waste form Ion irradiation Grain growth Bubble formation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
