Orientation relationship between TiFeH and TiFe phases in AB-type Ti–Fe–V–Ce hydrogen storage alloy
Source abstract
Abstract
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 β-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.
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Research context
OpenAlex topics: Hydrogen Storage and Materials · Hybrid Renewable Energy Systems · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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