Effects of tritium content on lattice parameter, 3He retention,and structural evolution during aging of titanium tritide |
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| Affiliation: | 1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;2. Thin Film Centre, Scottish Universities Physics Alliance (SUPA), University of West of Scotland, Paisley PA1 2BE, UK;1. Depto. de Ciencias Ambientales, DICIVA, Universidad de Guanajuato, México;2. Unidad de Ingeniería Avanzada, Centro de Investigación y Estudios Avanzados (CINVESTAV), Av. del Bosque 1145, Zapopan 45019, Jalisco, México;1. Institute of Modern Physics, Northwest University, Xi''an 710069, People''s Republic of China;2. The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi''an Jiaotong University, Xi''an 710049, People''s Republic of China;1. Downstream Technology Division, CRAUN Research Sdn Bhd, 93055 Kuching, Sarawak, Malaysia;2. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia;3. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia;1. Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland;2. Centre of New Technologies, University of Warsaw, Żwirki i Wigury 93, 02-089 Warsaw, Poland |
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| Abstract: | Effects of tritium content on crystal lattice, 3He retention and structure evolution during aging of Ti tritides were investigated using X-ray diffraction, together with analysis of 3He release. Phase transformation and lattice parameters of the Ti tritides varied apparently depending on tritium stoichiometry. Initial tritium content in the Ti tritides showed significant effects on 3He retention due to the existence of α + δ phase boundaries and lattice symmetry in the Ti tritide. The critical contents of 3He release in the α + δ phase region and ε phase region were found to be smaller than that in the δ phase region. Variation of crystal lattice structures of α + δ, δ and ε phases in the Ti tritides has been investigated, and evolution of 3He during aging is mainly governed by the finite defects of self-interstitial atoms, dislocation loops, 3He bubbles, and dislocations created by formation and growth of 3He bubbles. In the α + δ two phase region, the phase boundaries played an important role to accumulate 3He bubbles and cause inter-bubble fracture. In the ε phase region, a preferred condensation of finite defects in basal plane of Ti tritide lattice and formation of a dislocation network were identified. |
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| Keywords: | Titanium tritide Crystal structure Helium evolution Aging effect |
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