Methods to Improve the First Hydrogenation of the Vanadium-Rich BCC Alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub>
In this paper we report the effect of three different preparation methods on the first hydrogenation of the vanadium-rich BCC alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub>: one-time cold rolling, 5 min ball milling and addition of 4 wt.% of Zr. All samples we...
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MDPI AG
2022-07-01
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| Series: | Hydrogen |
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| Online Access: | https://www.mdpi.com/2673-4141/3/3/18 |
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| author | Francia Ravalison Eugen Rabkin Jacques Huot |
| author_facet | Francia Ravalison Eugen Rabkin Jacques Huot |
| author_sort | Francia Ravalison |
| collection | DOAJ |
| description | In this paper we report the effect of three different preparation methods on the first hydrogenation of the vanadium-rich BCC alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub>: one-time cold rolling, 5 min ball milling and addition of 4 wt.% of Zr. All samples were synthesized by arc melting. Without Zr addition the alloy was single phase, but when 4 wt.% Zr was added, a secondary zirconium-rich phase was present. However, X-ray diffraction patterns only showed a single-body-centred cubic phase before hydrogenation for all samples. The crystal structure of the fully hydrogenated samples was body-centred tetragonal. The highest hydrogen capacity (3.8 wt.%) was measured for the Zr-doped alloy. The ball-milled alloy also exhibited a high storage capacity and fast kinetics. However, the maximum hydrogen storage capacity slightly decreased after cold rolling. It was found that air exposure increases incubation time for the first hydrogenation. The incubation time was shortened by cold rolling which, however, reduced the hydrogen storage capacity. The Pressure-Composition isotherms of Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub> + 4 wt.% Zr at 297, 303 and 323 K were determined. The determined enthalpy and entropy of hydrides formation were −41 ± 5 kJ/mol and −134 ± 14 J/mol/K, respectively. |
| first_indexed | 2024-03-09T23:50:58Z |
| format | Article |
| id | doaj.art-b47862a979374e228d34bedaf9115a45 |
| institution | Directory Open Access Journal |
| issn | 2673-4141 |
| language | English |
| last_indexed | 2024-03-09T23:50:58Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Hydrogen |
| spelling | doaj.art-b47862a979374e228d34bedaf9115a452023-11-23T16:34:46ZengMDPI AGHydrogen2673-41412022-07-013330331110.3390/hydrogen3030018Methods to Improve the First Hydrogenation of the Vanadium-Rich BCC Alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub>Francia Ravalison0Eugen Rabkin1Jacques Huot2Hydrogen Research Institute, Université du Québec à Trois-Rivières, 3351 Des Forges, Three Rivers, QC G9A 5H7, CanadaDepartment of Materials Science and Engineering, Technion-Israel Institute of Technology, Technion City, Haifa 3200003, IsraelHydrogen Research Institute, Université du Québec à Trois-Rivières, 3351 Des Forges, Three Rivers, QC G9A 5H7, CanadaIn this paper we report the effect of three different preparation methods on the first hydrogenation of the vanadium-rich BCC alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub>: one-time cold rolling, 5 min ball milling and addition of 4 wt.% of Zr. All samples were synthesized by arc melting. Without Zr addition the alloy was single phase, but when 4 wt.% Zr was added, a secondary zirconium-rich phase was present. However, X-ray diffraction patterns only showed a single-body-centred cubic phase before hydrogenation for all samples. The crystal structure of the fully hydrogenated samples was body-centred tetragonal. The highest hydrogen capacity (3.8 wt.%) was measured for the Zr-doped alloy. The ball-milled alloy also exhibited a high storage capacity and fast kinetics. However, the maximum hydrogen storage capacity slightly decreased after cold rolling. It was found that air exposure increases incubation time for the first hydrogenation. The incubation time was shortened by cold rolling which, however, reduced the hydrogen storage capacity. The Pressure-Composition isotherms of Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub> + 4 wt.% Zr at 297, 303 and 323 K were determined. The determined enthalpy and entropy of hydrides formation were −41 ± 5 kJ/mol and −134 ± 14 J/mol/K, respectively.https://www.mdpi.com/2673-4141/3/3/18BCC alloysball millingcold rollingkineticshydrogen storagethermodynamics |
| spellingShingle | Francia Ravalison Eugen Rabkin Jacques Huot Methods to Improve the First Hydrogenation of the Vanadium-Rich BCC Alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub> Hydrogen BCC alloys ball milling cold rolling kinetics hydrogen storage thermodynamics |
| title | Methods to Improve the First Hydrogenation of the Vanadium-Rich BCC Alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub> |
| title_full | Methods to Improve the First Hydrogenation of the Vanadium-Rich BCC Alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub> |
| title_fullStr | Methods to Improve the First Hydrogenation of the Vanadium-Rich BCC Alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub> |
| title_full_unstemmed | Methods to Improve the First Hydrogenation of the Vanadium-Rich BCC Alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub> |
| title_short | Methods to Improve the First Hydrogenation of the Vanadium-Rich BCC Alloy Ti<sub>16</sub>V<sub>60</sub>Cr<sub>24</sub> |
| title_sort | methods to improve the first hydrogenation of the vanadium rich bcc alloy ti sub 16 sub v sub 60 sub cr sub 24 sub |
| topic | BCC alloys ball milling cold rolling kinetics hydrogen storage thermodynamics |
| url | https://www.mdpi.com/2673-4141/3/3/18 |
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