Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy Alloy
This study employed annealing heat treatment ranging from 900 to 1300 °C to systematically investigate the effects of annealing temperature on the microstructure and hydrogen storage performance of the equimolar TiZrCrMnFeNi high-entropy alloy. The research indicates that the TiZrCrMnFeNi high-entro...
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MDPI AG
2025-03-01
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| Online Access: | https://www.mdpi.com/2073-4352/15/4/297 |
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| author | Tengfei Cheng Jing Huang Wanggang Fang Liqing He Xiangqun Duan Guotong Zou Xiao Li Xinghai Ren |
| author_facet | Tengfei Cheng Jing Huang Wanggang Fang Liqing He Xiangqun Duan Guotong Zou Xiao Li Xinghai Ren |
| author_sort | Tengfei Cheng |
| collection | DOAJ |
| description | This study employed annealing heat treatment ranging from 900 to 1300 °C to systematically investigate the effects of annealing temperature on the microstructure and hydrogen storage performance of the equimolar TiZrCrMnFeNi high-entropy alloy. The research indicates that the TiZrCrMnFeNi high-entropy alloy is composed of the C14 Laves phase and a small amount of cubic phase. Compared to the as-cast alloy, the alloy annealed at high temperature (1000~1200 °C) exhibited increased microstructure homogeneity, a higher content of the C14 Laves phase, and a significant enhancement in hydrogen storage capacity. The annealing heat treatment led to changes in the unit cell volume of the C14 Laves phase, with an inverse relationship between unit cell volume and hydrogen absorption and desorption plateau pressures. An increase in unit cell volume resulted in a lower desorption plateau pressure, making the desorption reaction more difficult and consequently increasing the enthalpy change for desorption. This study not only reveals the intrinsic relationship between annealing temperature and the hydrogen storage performance of high-entropy alloys, but also provides significant experimental evidence and theoretical guidance for the design and development of high-entropy alloy materials with excellent hydrogen storage characteristics. |
| format | Article |
| id | doaj-art-c5fc388313ce41bcb52e567fd6b29cf4 |
| institution | OA Journals |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj-art-c5fc388313ce41bcb52e567fd6b29cf42025-08-20T02:17:24ZengMDPI AGCrystals2073-43522025-03-0115429710.3390/cryst15040297Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy AlloyTengfei Cheng0Jing Huang1Wanggang Fang2Liqing He3Xiangqun Duan4Guotong Zou5Xiao Li6Xinghai Ren7Hefei General Machinery Research Institute Co., Ltd., Hefei 230031, ChinaHefei General Machinery Research Institute Co., Ltd., Hefei 230031, ChinaHefei General Machinery Research Institute Co., Ltd., Hefei 230031, ChinaHefei General Machinery Research Institute Co., Ltd., Hefei 230031, ChinaHefei General Machinery Research Institute Co., Ltd., Hefei 230031, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaHefei General Machinery Research Institute Co., Ltd., Hefei 230031, ChinaHefei General Machinery Research Institute Co., Ltd., Hefei 230031, ChinaThis study employed annealing heat treatment ranging from 900 to 1300 °C to systematically investigate the effects of annealing temperature on the microstructure and hydrogen storage performance of the equimolar TiZrCrMnFeNi high-entropy alloy. The research indicates that the TiZrCrMnFeNi high-entropy alloy is composed of the C14 Laves phase and a small amount of cubic phase. Compared to the as-cast alloy, the alloy annealed at high temperature (1000~1200 °C) exhibited increased microstructure homogeneity, a higher content of the C14 Laves phase, and a significant enhancement in hydrogen storage capacity. The annealing heat treatment led to changes in the unit cell volume of the C14 Laves phase, with an inverse relationship between unit cell volume and hydrogen absorption and desorption plateau pressures. An increase in unit cell volume resulted in a lower desorption plateau pressure, making the desorption reaction more difficult and consequently increasing the enthalpy change for desorption. This study not only reveals the intrinsic relationship between annealing temperature and the hydrogen storage performance of high-entropy alloys, but also provides significant experimental evidence and theoretical guidance for the design and development of high-entropy alloy materials with excellent hydrogen storage characteristics.https://www.mdpi.com/2073-4352/15/4/297TiZrCrMnFeNi high-entropy alloyannealingmicrostructurehydrogen storage performance |
| spellingShingle | Tengfei Cheng Jing Huang Wanggang Fang Liqing He Xiangqun Duan Guotong Zou Xiao Li Xinghai Ren Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy Alloy Crystals TiZrCrMnFeNi high-entropy alloy annealing microstructure hydrogen storage performance |
| title | Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy Alloy |
| title_full | Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy Alloy |
| title_fullStr | Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy Alloy |
| title_full_unstemmed | Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy Alloy |
| title_short | Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy Alloy |
| title_sort | effects of annealing on hydrogen storage performance in tizrcrmnfeni high entropy alloy |
| topic | TiZrCrMnFeNi high-entropy alloy annealing microstructure hydrogen storage performance |
| url | https://www.mdpi.com/2073-4352/15/4/297 |
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