Buryakovskaya Olesya A, Ambaryan Grayr N, Tarasenko Alexey B, Suleimanov Musi Zh, Vlaskin Mikhail S
Joint Institute for High Temperatures of the Russian Academy of Sciences, 125412 Moscow, Russia.
Materials (Basel). 2023 Jun 30;16(13):4745. doi: 10.3390/ma16134745.
In the present study, composite materials were elaborated of mixed scrap of Mg-based casting alloys and low melting point Bi-Sn-Pb alloy by high energy ball milling, and their reactivity in NaCl solution with hydrogen release was tested. The impacts of the additive content and ball milling duration on their microstructure and hydrogen generation performance were investigated. Scanning electron microscopy (SEM) analysis revealed significant microstructural transformations of the particles during milling, and X-ray diffraction analysis (XRD) proved the formation of new intermetallic phases MgBi, MgSn, and MgPb. The said intermetallic phases were anticipated to act as 'microcathodes' enhancing galvanic corrosion of the base metal. The dependency of the samples' reactivity on the additive content and milling duration was determined to be nonmonotonic. For the samples with 0, 2.5, and 5 wt.% Rose alloy, ball-milling during 1 h provided the highest hydrogen generation rates and yields (as compared to 0.5 and 2 h), while in the case of the maximum 10 wt.%, the optimal time shifted to 0.5 h. The sample activated with 10 wt.% Rose alloy for 0.5 h provided the highest 'metal-to-hydrogen' yield and rapid reaction, thus overperforming those with lower additive contents and that without additives.
在本研究中，通过高能球磨法制备了镁基铸造合金混合废料与低熔点铋 - 锡 - 铅合金的复合材料，并测试了它们在氯化钠溶液中释放氢气的反应活性。研究了添加剂含量和球磨时间对其微观结构和产氢性能的影响。扫描电子显微镜（SEM）分析揭示了球磨过程中颗粒显著的微观结构转变，X射线衍射分析（XRD）证明形成了新的金属间相MgBi、MgSn和MgPb。预计上述金属间相将作为“微阴极”增强基体金属的电偶腐蚀。确定样品的反应活性对添加剂含量和球磨时间的依赖性是非单调的。对于含有0、2.5和5 wt.%罗斯合金的样品，球磨1小时提供了最高的产氢速率和产率（与0.5小时和2小时相比），而对于最大10 wt.%的情况，最佳时间转移到0.5小时。用10 wt.%罗斯合金活化0.5小时的样品提供了最高的“金属 - 氢”产率和快速反应，因此性能优于添加剂含量较低和无添加剂的样品。
