研究了三元Ti38Zr45Ni17准晶合金及其V合金化后的四元合金(Ti0.38Zr0.45Ni0.17)100-xVx(x=5%、10%、30%、40%、60%(原子分数))的吸放氢性能.准晶成分设计思想源自于团簇线方法,即在Ti-Zr-Ni三元合金体系中利用两条团簇线的交点确定最佳准晶成分Ti38Zr45Ni17.利用铜模吸铸快冷工艺制备直径为3mm的合金棒.吸放氢测试结果表明,Ti38Zr45Ni17准晶在303K首次吸氢量为0.9%(质量分数),在573K时合金首次吸氢量可达2.38%(质量分数),合金吸氢过程快速完成,并放出大量的热,可将吸氢前的粉末样品烧结成块体凝聚物.吸氢后准晶结构消失,完全转化为氢化物结构.添加5%～30%(原子分数)的V进行合金化时可提高合金在573K下的首次吸氢量,最大为2.96%(质量分数);具有固溶体结构的(Ti0.38Zr0.45Ni0.17)40V60合金在室温下首次吸氢量为3.2%(质量分数).由于准晶及其V合金化的合金在吸放氢之后均形成了稳定的氢化物,导致其放氢非常困难.
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