Heusler alloys have attracted much attention due to their low toxicity, mechanical and thermal stability, relative abundance, and potential for thermoelectric power generation. Herein, we demonstrate that TiFe₂Sn full-Heusler alloy can be obtained by a mechanochemical synthesis of metal precursors followed by spark plasma sintering. It is shown that thus prepared samples exhibit the ordered structure (Heusler phase, MnCu₂Al-type). The influence of processing parameters on microstructure, phase composition, and thermoelectric properties of TiFe₂Sn is studied. The thermoelectric figure of merit of the sample fabricated under optimal mechanochemical processing parameters is comparable to that of TiFe₂Sn synthesized using the conventional route. Thus, our results indicate that the mechanochemical synthesis is a facile, scalable, and cost-effective route for the preparation of TiFe₂Sn Heusler alloys.

Heusler合金因其低毒性，机械和热稳定性，相对丰度以及热电发电的潜力而备受关注。在本文中，我们证明了TiFe ₂ Sn全Heusler合金可以通过金属前驱体的机械化学合成，然后进行火花等离子体烧结来获得。结果表明，这样制备的样品显示出有序的结构（Heusler相，MnCu ₂ Al型）。研究了工艺参数对TiFe ₂ Sn组织，相组成和热电性能的影响。在最佳机械化学加工参数下制造的样品的热电品质因数可与TiFe ₂媲美使用常规路线合成的锡。因此，我们的结果表明，机械化学合成是制备TiFe ₂ Sn Heusler合金的便捷，可扩展且具有成本效益的途径。