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在氩气保护下,采用粉末烧结后液氮快速淬火处理并结合机械合金化工艺方法制备Mg_5Al_3Li_2合金,对样品材料的组织、吸放氢动力学以及热性质进行了研究。结果表明,采用烧结后液氮快速淬火处理工艺虽然未能改善Mg_5Al_3Li_2合金的氢化和脱氢动力学性能,使合金材料氢化物的脱氢温度以及脱氢激活能分别提高了15.1 K和14.5 k J/mol,但其氢化量随着温度的升高而增大。因此,下一步工作应优先考虑采用先球磨后烧结、SPS放电等离子烧结+球磨或高能球磨等另一制备工艺来提高Mg-Al-Li合金材料的储氢性能。
Under the protection of argon gas, the microstructure, hydrogen absorption and desorption kinetics and thermal properties of Mg_5Al_3Li_2 alloy were prepared by liquid nitrogen rapid quenching after powder sintering combined with mechanical alloying process. The results show that although the rapid quenching process of liquid nitrogen after sintering can not improve the hydrogenation and dehydrogenation kinetics of Mg_5Al_3Li_2 alloy, the dehydrogenation temperature and dehydrogenation activation energy of the hydride of the alloy material are increased by 15.1 K and 14.5 kJ / mol, but the amount of hydrogenation increases with the increase of temperature. Therefore, the next step should be prioritized using the first ball mill sintering, SPS discharge plasma sintering + ball milling or high-energy ball milling and other preparation processes to improve the Mg-Al-Li alloy hydrogen storage performance.