淬火对Mg_5Al_3Li_2合金储氢性能的影响  

Influence of quenching on hydrogen storage performance of Mg_5Al_3Li_2 alloy

作　　者：黄显吞[1] 李柳杰 谢政专 劳铭 Huang Xiantun Li Liujie Xie Zhengzhuan Lao Ming(Department of Materials Science and Engineering, Baise College, Baise Guangxi 533000, China College of Physical Science and Technology, Guangxi University, Nanning Guangxi 530004, China)

机构地区：[1]百色学院材料科学与工程学院,广西百色533000 [2]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《金属热处理》2016年第10期128-132,共5页Heat Treatment of Metals

基　　金：广西自然科学基金(2014GXNSFAA118346);广西高校重点学科:材料物理与化学(百色学院);广西高校特色专业及课程一体化建设项目(GXTSZY024)

摘　　要：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。Mg-Al-Li alloy were prepared by using liquid nitrogen rapid quenching process after powder sintering method and mechanical alloying under the argon atmosphere protection,and microstructure,hydrogen absorption and desorption kinetics and thermal properties were investigated. The results show that the liquid nitrogen rapid quenching process after sintering are not obviously improve Mg_5Al_3Li_2 hydrogen absorption and desorption kinetics performance of the alloy,especially the dehydrogenation temperature of liquid nitrogen quenching samples hydride and dehydrogenation activation energy raise 15. 1 K and 14. 5 k J / mol respectively,but the hydrogenated quantity increases with the increase of temperature. Therefore,the next step of work at first should be considered that using ball mill before sintering,SPS discharge plasma sintering ＋ ball mill or high energy ball mill another preparation technology to increase the Mg-Al-Li alloy of hydrogen storage properties.

关 键 词：Mg-Al-Li合金 粉末烧结 液氮淬火 储氢性能 

分 类 号：TG139[一般工业技术—材料科学与工程]