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Structural and Hydrogen Storage Properties of Mg60-Ni40 and Mg80-Ni20 Alloys Prepared by Planar Flow Casting
Journal of Materials Engineering and Performance ( IF 2.3 ) Pub Date : 2020-09-01 , DOI: 10.1007/s11665-020-05069-1
Sefa Emre Sünbül , Sultan Öztürk , Kürşat İçin

This study was carried out to better understand the chemical composition, microstructure, and hydrogen properties of Mg binary alloys. In this study, Mg60-Ni40 and Mg80-Ni20 (wt.%) alloy ribbons with different microstructures have been produced by the melt spinning method. The structural, hydriding, and dehydriding properties of the alloys were evaluated. The phase constitutions and microstructures were characterized by XRD and SEM studies. Microstructural grain sizes measured for Mg60-Ni40 alloy ribbons were in the range of 1-5 µm, and the alloy contained finely dispersed Mg and Mg2Ni phases. In the case of Mg80-Ni20 alloy ribbons, the microstructural grain sizes were measured as less than 1 µm. The hydrogen absorption and desorption capacities and kinetics of these two alloys were found to be highly dependent on microstructure and phase properties. Also, the amount of Ni content affected both the hydrogen storage capacities and kinetics for both of the Mg-Ni binary alloys. The increasing amount of Ni resulted in reduced hydrogen absorption capacity. The Mg60-Ni40 and Mg80-Ni20 alloy ribbons demonstrated superior hydrogenation absorption capacity at 350 °C and reversibly absorbed about 4.62 and 5.51 (wt.%) mass hydrogen, respectively.



中文翻译:

平面流铸法制备Mg60-Ni40和Mg80-Ni20合金的结构和储氢性能

进行这项研究是为了更好地理解Mg二元合金的化学组​​成,微观结构和氢性质。在这项研究中,通过熔体纺丝法生产了具有不同显微组织的Mg60-Ni40和Mg80-Ni20(wt。%)合金带。评估了合金的结构,氢化和脱水性能。通过XRD和SEM研究表征了相的组成和微观结构。对Mg60-Ni40合金薄带测得的微结构晶粒尺寸在1-5 µm的范围内,并且该合金包含细分散的Mg和Mg 2镍相。在Mg80-Ni20合金薄带的情况下,测得的微结构晶粒尺寸小于1 µm。发现这两种合金的氢吸收和解吸能力以及动力学高度依赖于微观结构和相性质。而且,Ni含量的量影响两种Mg-Ni二元合金的储氢能力和动力学。Ni的增加导致氢吸收能力降低。Mg60-Ni40和Mg80-Ni20合金薄带在350°C时表现出优异的氢化吸收能力,可逆吸收的氢质量分别约为4.62和5.51(wt。%)。

更新日期:2020-09-02
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