中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2013年
12期
3677-3684
,共8页
宋文杰%李金山%张铁邦%侯小江%寇宏超%薛祥义%胡锐
宋文傑%李金山%張鐵邦%侯小江%寇宏超%薛祥義%鬍銳
송문걸%리금산%장철방%후소강%구굉초%설상의%호예
Mg2Ni%储氢%动力学%微观组织
Mg2Ni%儲氫%動力學%微觀組織
Mg2Ni%저경%동역학%미관조직
Mg2Ni%hydrogen storage%kinetics%microstructure
为了提高Mg2Ni基合金的储氢动力学性能，通过熔炼方法分别添加金属元素Nd，Zn和Ti来防止镁的氧化和蒸发，将Mg2Ni基合金在有覆盖剂保护的电阻炉中进行熔炼。借助XRD 和 SEM/EDS研究了铸态合金的相组成和微观组织。采用定容法在Sievert’s型PCT测试仪上测试了合金的氢化动力学性能。Nd、Zn和Ti的添加导致了微量相Mg6Ni和Ni3Ti的生成。Nd和Zn溶解在Mg2Ni基合金的α-Mg、Mg2Ni和MgNi2相中。添加Nd元素后，合金的首次吸氢量高于Mg2Ni的，达到2.86%(质量分数)。Mg2Ni基合金的吸氢动力学性能和活化性能均有所提高。在前3次吸放氢循环过程中，添加Zn和Ti的合金吸氢量和吸氢动力学性能均得到提高。采用Hirooka动力学模型分析了合金的氢化动力学性能及反应机制。
為瞭提高Mg2Ni基閤金的儲氫動力學性能，通過鎔煉方法分彆添加金屬元素Nd，Zn和Ti來防止鎂的氧化和蒸髮，將Mg2Ni基閤金在有覆蓋劑保護的電阻爐中進行鎔煉。藉助XRD 和 SEM/EDS研究瞭鑄態閤金的相組成和微觀組織。採用定容法在Sievert’s型PCT測試儀上測試瞭閤金的氫化動力學性能。Nd、Zn和Ti的添加導緻瞭微量相Mg6Ni和Ni3Ti的生成。Nd和Zn溶解在Mg2Ni基閤金的α-Mg、Mg2Ni和MgNi2相中。添加Nd元素後，閤金的首次吸氫量高于Mg2Ni的，達到2.86%(質量分數)。Mg2Ni基閤金的吸氫動力學性能和活化性能均有所提高。在前3次吸放氫循環過程中，添加Zn和Ti的閤金吸氫量和吸氫動力學性能均得到提高。採用Hirooka動力學模型分析瞭閤金的氫化動力學性能及反應機製。
위료제고Mg2Ni기합금적저경동역학성능，통과용련방법분별첨가금속원소Nd，Zn화Ti래방지미적양화화증발，장Mg2Ni기합금재유복개제보호적전조로중진행용련。차조XRD 화 SEM/EDS연구료주태합금적상조성화미관조직。채용정용법재Sievert’s형PCT측시의상측시료합금적경화동역학성능。Nd、Zn화Ti적첨가도치료미량상Mg6Ni화Ni3Ti적생성。Nd화Zn용해재Mg2Ni기합금적α-Mg、Mg2Ni화MgNi2상중。첨가Nd원소후，합금적수차흡경량고우Mg2Ni적，체도2.86%(질량분수)。Mg2Ni기합금적흡경동역학성능화활화성능균유소제고。재전3차흡방경순배과정중，첨가Zn화Ti적합금흡경량화흡경동역학성능균득도제고。채용Hirooka동역학모형분석료합금적경화동역학성능급반응궤제。
In order to enhance the hydrogen absorption kinetics of the Mg2Ni-based alloys, metal elements (Nd, Zn, and Ti) were added during melting process, respectively. The Mg2Ni-based alloys were melted using an electric resistance furnace under the protection of the covering reagent to prevent the oxidation and the evaporation of magnesium. Phase compositions and microstructures of as-cast alloys were characterized by XRD and SEM equipped with EDS. Hydrogenation kinetics of experimental alloys were investigated by the constant volume method using a Sievert-type apparatus. The addition of Nd, Zn or Ti elements to Mg2Ni results in the formation of minor phases Mg6Ni and Ni3Ti. Nd and Zn are dissolved inα-Mg, Mg2Ni and MgNi2 phases in Mg2Ni-based alloys. With the addition of Nd, the hydrogen content of the first absorption is 2.86%in mass fraction, which is higher than that of the Mg2Ni. Hydrogen absorption kinetics and activation properties of Mg2Ni-based alloys are improved evidently. During the initial three hydrogenation/dehydrogenation cycles, the hydrogen absorption capacity and kinetics properties have been improved for alloys with the addition of transition element Zn or Ti. The kinetics properties of the experimental alloys and absorbing reaction mechanism were also analyzed with the help of the Hirooka kinetics model.
