Unveiling the role of indium and tin in Al–Ga based alloys for on-demand hydrogen supply from simulation to validation
Unveiling the role of indium and tin in Al–Ga based alloys for on-demand hydrogen supply from simulation to validation
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DOI：
10.1016/j.jpowsour.2022.232268
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发表时间：
2023-01
影响因子：
9.2
通讯作者：
Zhijiang Jin;Hongchao Wang;Jie Shi;Hao Wang;Xiao Gao;Qian Gao;Xiaoli Sun
中科院分区：
文献类型：
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作者：
Zhijiang Jin;Hongchao Wang;Jie Shi;Hao Wang;Xiao Gao;Qian Gao;Xiaoli Sun
Al-Ga基合金是一种重要的恶劣工况在线供氢材料。迄今为止，合金的活化机理仍不清楚，特别是为什么在合金的性能中必不可少的是In或Sn的原因尚不清楚。在此，我们精心设计并实施了模拟和验证实验，以揭示铟和锡在合金中的作用。在模拟实验中，我们将液态金属（LMs）渗透到Al薄片中，分析其对Al微观结构的影响以及In或Sn对Ga分布的影响。我们发现In和Sn的活化效果是不同的。随后的验证实验证实了上述结论，与Sn相比，In更倾向于在合金内部产生更深更宽的裂纹，从而使合金在水解过程中更容易断裂，从而保证更高的产率。此外，我们发现Sn促进了反应速率，这可以通过实验和理论计算来解释。最后，提出了一种基于低熔点相的Al基合金脆性机制，为材料性能的解释和材料的精密设计提供了参考。并对实际工况下的样品选择提出了建议。
Al–Ga based alloys are important on-line hydrogen supply materials under harsh working conditions. Up to now, the activation mechanism is still unclear, especially the reason why In or Sn is indispensable to the alloys' performance is unknown. Here, we elaborately designed and implemented the simulation and validation experiments to unveil the role of indium and tin in the alloys. In simulation experiments, we conducted the penetration of liquid metals (LMs) into Al sheets to analyze its influence on Al's microstructure and the effects of In or Sn on Ga's distribution. We found that the activation effects of In and Sn are different. Subsequently, the validation experiments confirmed the above conclusion that In favors inducing deeper and wider cracks inside the alloy compared with Sn, thus making the alloy easier to break during hydrolysis and ensuring higher yields. Moreover, we found that Sn facilitated the reaction rate, which was explained by experiments and the theoretical calculation. Finally, a novel Al matrix embrittlement mechanism based on low-melting-point phases was proposed for Al–Ga based alloys, which provided a reference for the interpretation of material properties and precise material design. In addition, we gave suggestions for sample selection in actual working conditions.