TiVMn and TiCrMn alloys are promising hydrogen storage materials for onboard application due to their high hydrogen absorption content. However, the traditional synthesis method of melting and continuous necessary heat treatment and activation process are energy- and time-consuming. There is rarely any report on kinetics improvement and nanoprocessing in TiVMn- and TiCrMn-based alloys. Here, through ball milling with carbon black as additive, we synthesized face-centered cubic (FCC) structure TiVMn- and TiCrMn-based nanoalloys with mean particle sizes of around a few to tens of μm and with the crystallite size just 10 to 13 nm. Differential scanning calorimetry (DSC) measurements under hydrogen atmosphere of the two obtained TiVMn and TiCrMn nanoalloys show much enhancement on the hydrogen absorption performance. The mechanism of the property improvement and the difference in the two samples were discussed from microstructure and morphology aspects. The study here demonstrates a new potential methodology for development of next-generation hydrogen absorption materials.

中文翻译：

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具有 FCC 结构的 TiVMn 和 TiCrMn 纳米合金的合成、形貌和吸氢性能

TiVMn 和 TiCrMn 合金由于其高吸氢含量而成为有前途的车载储氢材料。然而，传统的熔融合成方法和连续必要的热处理和活化过程，既耗能又耗时。很少有关于 TiVMn 和 TiCrMn 基合金的动力学改进和纳米加工的报道。在这里，通过以炭黑为添加剂的球磨，我们合成了面心立方 (FCC) 结构的 TiVMn 和 TiCrMn 基纳米合金，其平均粒径约为几至几十微米，晶粒尺寸仅为 10 至 13 nm . 两种获得的 TiVMn 和 TiCrMn 纳米合金在氢气氛下的差示扫描量热法 (DSC) 测量显示氢吸收性能有很大提高。从微观结构和形貌两个方面讨论了性能改进的机制和两种样品的差异。这里的研究展示了开发下一代吸氢材料的新潜在方法。