Ti_(10)V_(83-x)Fe_6ZrMn_x(x=0～6)合金的微观结构和储氢性能  

Microstructures and hydrogen storage properties of Ti_(10)V_(83-x)Fe_6ZrMn_x alloys

作　　者：杭州明[1] 肖学章[1] 吴哲[1] 李寿权[1] 葛红卫[1] 陈长聘[1] 陈立新[1] 

机构地区：[1]浙江大学材料科学与工程学系,浙江杭州310027

出　　处：《功能材料》2009年第11期1843-1846,共4页Journal of Functional Materials

基　　金：国家高技术研究与发展计划资助项目(2006AA05Z144);浙江省重大科技专项资助项目(2006C11233);教育部新世纪优秀人才支持计划资助项目(NCET-07-0741)

摘　　要：采用磁悬浮感应熔炼方法制备了Ti10 V83-x Fe6ZrMnx(x=0、2、4、6)储氢合金,系统研究了Mn含量对合金微观结构和储氢特性的影响。XRD及SEM分析表明,无Mn合金(x=0)具有体心立方(bcc)结构的Ti-V基固溶体单相结构,而含Mn合金(x=2～6)均由bcc主相和C14型Laves第二相组成;随着Mn含量的增加,合金bcc主相的晶格常数和晶胞体积逐渐减小。储氢性能测试表明:该系列合金的吸氢动力学性能较好,在室温和4MPa初始氢压条件下,含Mn合金无需氢化孕育期就能快速吸氢;随着Mn含量的增加,合金的P-C-T放氢平台倾斜度逐渐减小,333K放氢平台压力先增后减,并在x=4达到最高;但合金的室温吸氢容量和333K有效放氢容量随Mn含量的增加而逐渐降低。Ti10V83-xFe6ZrMnx （x= 0, 2, 4, 6） hydrogen storage alloys were prepared by induction melting with magnetic levitation, and the effects of Mn content on the microstructures and hydrogen storage properties of the alloys have been investigated systematically. XRD and SEM analyses show that the Mn-free alloy with x=0 has a single Ti-V based solid solution phase with bcc structure, while other alloys with x= 2-6 consist of a bcc main phase and a small fraction of C14 type laves secondary phase. The lattice parameter and unit cell volume of the bee main phase decrease with the increase of the Mn content. It is found that all of these alloys have good activation behaviors and hydriding kinetics. The alloys containing Mn can absorb hydrogen without hydriding incubation time at 298K and under an initial hydrogen pressure of 4MPa. With increasing the Mn content in the alloys, the hydrogen desorption plateau is flattened, the plateau pressure increases first and then drops. However, the maximum hydrogen absorption capacity at 298K and the effective hydrogen desorption capacity at 333K decrease gradually with the increase of the Mn content.

关 键 词：储氢合金 Ti-V基固溶体 微观结构 储氢性能 MN含量 

分 类 号：TG139.7[一般工业技术—材料科学与工程]