性能的影响
(南京工业大学 材料科学与工程学院，南京 210009)
摘 要: 研究Ni部分取代Al对Zintl相合金SrAl2结构和储氢动力学性能的影响。对合金的吸氢动力学曲线进行拟合，得到了动力学回归方程，并分析了合金的吸氢控制步骤。XRD分析表明，Ni取代Al后合金主要由SrAl2、Sr5Al9、AlNi和SrAl相组成；随着Ni取代量的增加，SrAl2与Sr5Al9相逐渐减少，而AlNi和SrAl相逐渐增加。氢化测试表明，Ni的加入降低了合金的最大吸氢容量，但是却极大地提高了合金的吸氢动力学性能。
关键字: 储氢材料；SrAl2合金；Zintl相；动力学
（College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China）
Abstract:The effect of partial substitution of Al by Ni on the crystal structure and hydrogenation kinetics of the Zintl phase alloy SrAl2 was studied by X-ray diffraction (XRD) and hydrogenation measurements. The kinetic parameters and control steps for the hydrogenation of SrAl2−x<, /I>Nix alloys were studied. The results show that the Ni-substituted alloy is mainly composed of SrAl2, Sr5Al9, SrAl and AlNi phases. With the increase of Ni substitution content, the amount of SrAl2 and Sr5Al9 phases decreases, while the amount of SrAl and AlNi phase increases. The maximum hydrogen absorption capacity is decreased, but the hydrogenation kinetics of the alloy is improved greatly after Ni substitution.
Key words: hydrogen storage material; SrAl2 alloy; Zintl phase; kinetics
