Ti_(38)Zr_(45)Ni_(17)准晶合金的储氢性能及其V合金化  

Hydrogen storage of quasicrystalline Ti_(38)Zr_(45)Ni_(17)and after V alloying

作　　者：袁亮[1] 王清[1] 侯晓多[1] 董闯[1] 汪海斌[1] 马仁涛[1] 徐芬[2] 孙立贤[2] 

机构地区：[1]大连理工大学三束材料改性国家重点实验室,辽宁大连116024 [2]中国科学院大连化物所材料热化学研究室,辽宁大连116023

出　　处：《功能材料》2008年第8期1318-1321,共4页Journal of Functional Materials

基　　金：国家自然科学基金(50631010;50671018);国家高技术研究发展计划(863计划)资助项目(2007AA05Z102)

摘　　要：研究了三元Ti_(38)Zr_(45)Ni_(17)准晶合金及其V合金化后的四元合金(Ti_(0.38)Zr_(0.45)Ni_(0.17))_(100-x)V_x(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Ti_(38)Zr_(45)Ni_(17)。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,Ti_(38)Zr_(45)Ni_(17)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(Ti_(0.38) Zr_(0.45)Ni_(0.17))_(40)V_(60)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。This paper investigates hydrogen absorption and desorption properties of quasicrystalline Ti38 Zr45Ni17 and V-alloyed （Ti0. 38 Zr0. 45 Ni0.17 ） 100-x Vx （x = 5 %, 10 %, 30 %, 40 %, 60at % ）. The composition design for the quasicrystal is uses the cluster line approach, where two cluster lines Zr8 Ni3-Ti and Ti9 Ni4- Zr intersect at the ternary quasicrystal composition Ti38 Zr45 Ni17 in the Ti-Zr-Ni system. The alloy rods with a diameter of 3mm are prepared by copper mould suction-casting method. The experimental results indicate that the Ti38Zr,5 Ni17 quasicrystal can absorb 0.9wt% of hydrogen at the first time at 303K,while the first-time maximum hydrogen content at 573K reaches 2.38wt%. The hydrogen-absorbing process is finished in a very short time,with the release of a large amount of heat which can even sinter the powder sample. The quasicrystal structure completely convert to hydrid after hydrogen absorption. 5%-30at% V alloying of the ternary quasicrystal composition enhances the first-time hydrogen absorption capacity with the maximum reaching 2.96wt% at 573K. The solid solution alloy （Ti0.38Zr0.45 Ni0.17）40 V60 absorbs hydrogen at room-temperature with a capacity of 3.2wt% hydrogen. Both the quasicrystalline and its V alloying quaternary alloy convert into hydrid after hydrogen absorption,which causes the hydrogen releases are difficult.

关 键 词：Ti-Zr-Ni准晶 Ti-Zr-Ni-V合金 飞分设计 储氢性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程]