A Comparison Study of Hydrogen Storage Thermodynamics and Kinetics of YMg11Ni Alloy Prepared by Melt Spinning and Ball Milling
来源期刊：Acta Metallurgica Sinica2017年第11期
论文作者：Yang-Huan Zhang Wei Zhang Ze-Ming Yuan Wen-Gang Bu Yan Qi
文章页码：1040 - 1048
摘 要：Melt spinning（MS）and ball milling（BM）were employed to fabricate YMg11Ni alloy,and their structures and hydrogen storage performances were examined.The results reveal that the as-spun and as-milled alloys both exhibit the nanocrystalline and amorphous structure.The as-milled alloy shows a larger hydrogen absorption capacity as compared with the as-spun alloy.More than that,the as-milled alloy exhibits lower onset hydrogen desorption temperature than the as-spun one,which are 549.8 and 560.9 K,respectively.Additionally,the as-milled alloy shows a superior hydrogen desorption property to the as-spun one.On the basis of the time needed by desorbing hydrogen of 3 wt%H2,for the asmilled alloy,it needs 1106,456,343,and 180 s corresponding to hydrogen desorption temperatures of 593,613,633,and653 K.However,for the as-spun alloy,the time needed is greater than 2928,842,356,and 197 s corresponding to the same temperatures.Hydrogen desorption activation energies of as-milled and as-spun alloys are 98.01 and 105.49 k J/mol,respectively,which is responsible for that the as-milled alloy possesses a much faster dehydriding rate.By means of the measurement of pressure–composition–temperature（P–C–T）curves,the dehydrogenation enthalpy change of the alloys prepared by MS(DHde（MS）)and BM(DHde（BM）)is 81.84 and 79.46 k J/mol,respectively,viz.DHde（MS）[DHde（BM）.
Yang-Huan Zhang1,2，Wei Zhang1,2，Ze-Ming Yuan1,2，Wen-Gang Bu2，Yan Qi2
1. Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology2. Department of Functional Material Research,Central Iron and Steel Research Institute
摘 要：Melt spinning（MS）and ball milling（BM）were employed to fabricate YMg11Ni alloy,and their structures and hydrogen storage performances were examined.The results reveal that the as-spun and as-milled alloys both exhibit the nanocrystalline and amorphous structure.The as-milled alloy shows a larger hydrogen absorption capacity as compared with the as-spun alloy.More than that,the as-milled alloy exhibits lower onset hydrogen desorption temperature than the as-spun one,which are 549.8 and 560.9 K,respectively.Additionally,the as-milled alloy shows a superior hydrogen desorption property to the as-spun one.On the basis of the time needed by desorbing hydrogen of 3 wt%H2,for the asmilled alloy,it needs 1106,456,343,and 180 s corresponding to hydrogen desorption temperatures of 593,613,633,and653 K.However,for the as-spun alloy,the time needed is greater than 2928,842,356,and 197 s corresponding to the same temperatures.Hydrogen desorption activation energies of as-milled and as-spun alloys are 98.01 and 105.49 k J/mol,respectively,which is responsible for that the as-milled alloy possesses a much faster dehydriding rate.By means of the measurement of pressure–composition–temperature（P–C–T）curves,the dehydrogenation enthalpy change of the alloys prepared by MS(DHde（MS）)and BM(DHde（BM）)is 81.84 and 79.46 k J/mol,respectively,viz.DHde（MS）[DHde（BM）.
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