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采用感应熔炼法制备了Mg2Ni1-xZrx(x=0、0.2、0.4)合金,研究了Zr的添加对Mg系储氢合金储氢性能的影响。对合金的成分和微观组织进行分析,结果表明,Zr较难融入到合金,但是Zr能使得合金晶粒得到细化,且合金中都有Mg2Ni相的形成,有利于吸氢反应的进行。利用PCT测试仪测定了合金的储氢性能,结果表明:添加Zr元素的添加能有效降低Mg2Ni的吸放氢温度,并能有效提高提高合金的吸氢量,最高吸氢量达到4.91wt%。
The Mg2Ni1-xZrx (x = 0, 0.2, 0.4) alloys were prepared by induction melting. The effects of Zr addition on the hydrogen storage properties of Mg-based hydrogen storage alloys were investigated. The composition and microstructure of the alloy were analyzed. The results show that Zr is more difficult to be incorporated into the alloy. However, the grain size of the alloy can be refined by Zr. The formation of Mg2Ni phase in the alloy is beneficial to the hydrogen absorption reaction. The hydrogen storage capacity of the alloy was measured by PCT tester. The results show that the addition of Zr can effectively reduce the hydrogen absorption and desorption temperature of Mg2Ni and increase the hydrogen absorption capacity of the alloy. The maximum hydrogen absorption reaches 4.91wt%.