Exploration and optimization of ZrCo(Ti) type film for high hydrogen density and thermal stability of the hydride |
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| Affiliation: | 1. Science and Technology on Surface Physics and Chemistry Laboratory, P. O. Box 9072-35, Mianyang, 621908, China;2. Institute of Materials, China Academy of Engineering Physics, P. O. Box 9071-12, Mianyang, 621907, China;1. School of Mathematics and Physics, Anhui Jianzhu University, Hefei, 230601, PR China;2. Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P. O. Box 1129, Hefei, 230031, PR China;3. College of Science, Zhongyuan University of Technology, Zhengzhou, 450007, PR China;4. Shchool of Environmental and Energy Engineering, Key Laboratory of Anhui Province of Water Pollution Control and Wastewater Reuse, Anhui Jianzhu University, HeFei, China;1. Science and Technology on Surface Physics and Chemistry Laboratory, Mianyang, 621907, China;2. Institute of Materials, China Academy of Engineering Physics, Mianyang, 621900, China;3. Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing, 402160, China;1. Institute of Atomic and Molecular Physics, Sichuan University, 610065, Chengdu, China;2. College of Physics, Sichuan University, 610065, Chengdu, China;3. Science and Technology on Surface Physics and Chemistry Laboratory, P. O. Box 9071-35, Jiangyou, 621907, China;4. College of Mathematics, Sichuan University, 610065, Chengdu, China;1. The First Sub-Institute, Nuclear Power Institute of China, Chengdu, 610005, China;2. College of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China;3. China Academy of Engineering Physics, P.O.Box 9072, Jiangyou 621908, China;1. State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;2. Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Hangzhou 310013, Zhejiang, China;3. Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, Sichuan, China;4. State Key Laboratory of Surface Physics and Chemistry, Mianyang 621907, Sichuan, China;1. State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China;2. Institute of Materials, China Academy of Engineering Physics, Mianyang 621907, PR China;3. State Key Laboratory of Surface Physics and Chemistry, Mianyang 621907, PR China |
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| Abstract: | Tritium target is of crucial importance in relation to the development of neutron generator apparatus. However, the prevalent Ti target is now suffering from the intricate procedures for activation, limited tritium content at room temperature (RT) and poor ability to fix the helium. Herein, a succession of new type ZrCo(Ti) alloy targets were designed and fabricated by magnetron sputtering. Firstly, the influence of technological parameters (types of substrate, sputtering temperatures, sputtering time and annealing temperatures) on the assemblage and also the hydrogen storage properties of the ZrCo films were systemically studied. The results show that high sputtering temperature is benefit to acquiring high crystallinity of ZrCo films, but the substrates seem to have no significant effect on that. The thickness and grain size of ZrCo film are both positively related to the sputtering time. However, the hydrogen uptake capacities (0.14 wt%~0.79 wt%) for all the prepared ZrCo films are relatively low. After that, the composition and microstructure of the ZrCo films were further regulated and optimized. On the one hand, Zr1-xTixCo films were constructed by introduction of Ti element, achieving a higher hydrogen absorption capacity (~0.7 wt%), but with weak thermal stability in the subsequent hydrogen desorption process (~80% of hydrogen escaped at 500 °C). On the other hand, the surface of the ZrCo film was modified by a thin layer of Ti, forming a serious of double-layer ZrCo/Ti films. The ZrCo/Ti composite films not only achieve extremely high hydrogen storage capacity (1.85 wt%), but also maintain strong thermal stability (only 15.7% of hydrogen escaped at 500 °C). These findings related to the ZrCo(Ti) films in this paper provide crucial reference for the development of tritiated ZrCo film targets, and spark inspiration even for the design of other new-type tritiated film target. |
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| Keywords: | Tritium target Technics ZrCo(Ti) films Hydrogen capacity Thermal stability |
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