| 陈思文,李若琳,江艳,张云龙.过计量比Zr-Ti-V合金的组织与吸氢性能[J].有色金属材料与工程,2024,45(5):63-69. |
| 过计量比Zr-Ti-V合金的组织与吸氢性能 |
| Microstructure and hydrogen absorption properties of over-stoichiometric Zr-Ti-V alloys |
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| DOI：10.13258/j.cnki.nmme.20230227001 |
| 中文关键词: 计量比 显微组织 Laves相 吸氢性能 |
| 英文关键词:stoichiometry microstructure Laves phase hydrogen absorption properties |
| 基金项目:2022江苏省高等学校大学生创新训练项目；江苏省中以产业技术研究院开放课题（JSIITRI202108） |
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| 中文摘要: |
| 采用真空电弧熔炼制备ZrTi0.2Vx（x=2.8，3.3）合金，随后进行均匀化退火处理。研究过计量比对合金的相组成、显微组织、吸氢性能及氢化产物的影响，并分析其影响机制。结果表明：均匀化退火处理可增加Laves相、减少V-BCC相、消除α-Zr相。V-BCC相含量随计量比的增大而增加。两种合金均能快速吸氢，在几十秒内达到基本饱和，吸氢速率差异不大。ZrTi0.2V3.3合金的压力-成分-温度（pressure-composition-temperature, PCT）曲线更加倾斜，吸氢量更低。ZrV2H4.5和VH0.81是饱和吸氢后的主要氢化物。Laves相氢化物占比更高是ZrTi0.2V2.8合金具有更高吸氢性能的主要原因。 |
| 英文摘要: |
| ZrTi0.2Vx (x=2.8, 3.3) alloys were prepared by vacuum arc melting followed by homogenization. The effects of over-stoichiometry on phase constitution, microstructures, hydrogen absorption properties and hydrogenated products were studied, and the influence mechanism was analyzed. The results show that the homogenization increases Laves phase, reduces V-BCC phase and eliminates α-Zr phase. The content of V-BCC phase increases with the increase of stoichiometry. Both the two alloys can absorb hydrogen quickly, and reach saturation in a few tens of seconds with little difference in the hydrogen absorption rate. The pressure-composition-temperature (PCT) curves of ZrTi0.2V3.3 alloy are more inclined, and the hydrogen absorption capacity is lower. ZrV2H4.5 and VH0.81 are the main hydrides after saturated hydrogen absorption. The higher ratio of Laves-hydride is the main reason for the higher hydrogen absorption properties of ZrTi0.2V2.8 alloy. |
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