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- W2917263839 abstract "Magnesium hydride (MgH 2 ) and titanium hydride (TiH 2 ) are two potential candidates for solid‐state hydrogen storage, but strong hydride formation energy in these hydrides undesirably results in their high dehydrogenation temperature. First‐principles calculations show that the metastable hydrides in the MgH 2 –TiH 2 system have low hydrogen binding energy, which makes them more appropriate for low‐temperature hydrogen storage. In this study, severe plastic deformation (SPD) via the high‐pressure torsion (HPT) method is applied to the MgH 2 –TiH 2 system to synthesize metastable hydrides. While MgH 2 transforms to a high‐pressure orthorhombic γ phase, TiH 2 does not exhibit any cubic‐to‐tetragonal phase transformation even by HPT processing at cryogenic temperature. Application of large strains by 400 HPT turns to the immiscible MgH 2 /TiH 2 composite results in atomic‐scale mixing and formation of nanostructured ternary Mg–Ti–H hydride with the metastable FCC structure and lower dehydrogenation temperature than TiH 2 ." @default.
- W2917263839 created "2019-03-02" @default.
- W2917263839 creator A5006369547 @default.
- W2917263839 creator A5027593036 @default.
- W2917263839 creator A5058363697 @default.
- W2917263839 creator A5089538318 @default.
- W2917263839 creator A5091626025 @default.
- W2917263839 date "2019-02-27" @default.
- W2917263839 modified "2023-10-13" @default.
- W2917263839 title "Phase Transformations in MgH <sub>2</sub> –TiH <sub>2</sub> Hydrogen Storage System by High‐Pressure Torsion Process" @default.
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- W2917263839 doi "https://doi.org/10.1002/adem.201900027" @default.
- W2917263839 hasPublicationYear "2019" @default.