Lee, Seung-Yong Ha, Taejun Suh, Jin-Yoo Kim, Dong-Ik Lee, Young-Su Shim, Jae-Hyeok 2024-04-11T02:00:10Z 2024-04-11T02:00:10Z 2024-04-11 2024-05 0925-8388 https://pubs.kist.re.kr/handle/201004/149612 The partially hydrogenated microstructure of an AB-type Ti-Fe-V-Ce hydrogen storage alloy was investigated using scanning electron microscopy (SEM) with electron backscatter diffraction (EBSD). For the first time, the formation of the orthorhombic beta-TiFeH phase was directly observed by using SEM-EBSD. Lamellar structures consisting of TiFeH and body-centered cubic TiFe phases with a (100)TiFeH||(100)TiFe habit-plane pair were observed. Pole figure analysis was performed to confirm the orientation relationship between the TiFeH and TiFe phases to be [011](100)TiFeH||[010](100)TiFe. The formation of TiFeH was characterized by simple lattice expansion with a short-range arrangement of H atoms and surface relief. In addition, unidirectional microcracks along the (100)TiFe planes were observed, presumably owing to the dehydrogenation of the TiFeH phase. English Elsevier BV Orientation relationship between TiFeH and TiFe phases in AB-type Ti-Fe-V-Ce hydrogen storage alloy Article 10.1016/j.jallcom.2024.173943 1 Journal of Alloys and Compounds, v.983 Journal of Alloys and Compounds 983 N scie scopus 001194447200001 2-s2.0-85185566845 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article HYDRIDE DIFFRACTION DIFFUSION ENERGY SYSTEM Hydride Hydrogen storage alloy Scanning electron microscopy Electron backscatter diffraction Orientation relationship Habit plane