重庆大学学报2016，Vol.39Issue(2)：107-113,7.DOI:10.11835/j.issn.1000-582X.2016.02.014
TiFe基储氢合金的BaZrO3坩埚熔炼制备及其储氢性能
Preparation of TiFe based alloys melted by BaZrO3 crucible and its hydrogen storage properties
摘要
Abstract
TiFe-based hydrogen storage alloy was prepared by using a self-made 25 kg BaZrO3 crucible with ZG-0.05 type vacuum induction melting system.The melting conditions are argon atmosphere of 0.6 MPa, refining time of 5~10 min and temperature of 1 450 ℃.The chemical composition of the as-cast sample was examined by means of inductive coupled plasma emission spectrometer (ICP )first,and then its microstructure,surface topography,element distribution in micro-domains and phase were examined by optical microscopy (OM),scanning electron microscopy (SEM),X-ray diffraction (XRD)and energy dispersive spectrometer (EDS),and finally its PCT curves were measured by gas reaction controller.The results show that,the oxygen contents of alloys prepared by the BaZrO3 crucible and the graphite crucible are are less than 0 .1%(ω),meanwhile the carbon content of alloys obtained by the electro graphite crucible is 0.417%(ω),which exceeds the tolerance of commercial alloys (1 000 ppm).The microstructure of the alloy melted by the BaZrO3 crucible is equiaxed crystal,but the alloy melted by the graphite crucible is composed of the equiaxed crystal and the spherical TiC particles distributed along grain boundaries or within the grain.The maximum amount of hydrogen absorption of the alloy melted by the BaZrO3 crucible is larger than that of the alloy melted by the graphite crucible,and the hydrogen desorption and absorption plateau pressure of the alloy meted by the BaZrO3 crucible is also lower.关键词
TiFe合金/储氢性能/BaZrO3 坩埚/真空感应熔炼/增碳Key words
TiFe alloy/hydrogen storage property/BaZrO3 refractory/vacuum induction melting/carbon contamination分类
矿业与冶金引用本文复制引用
李重河,周汉,陈光耀,胡仁民,吴铸,李志林..TiFe基储氢合金的BaZrO3坩埚熔炼制备及其储氢性能[J].重庆大学学报,2016,39(2):107-113,7.基金项目
国家重点基础研究发展计划（973计划）（2014CB643403）；国家自然科学基金项目（51225401，51374142）；上海市科委基金项目（11520500100，14JC1491400）。Supported by National Program on Key Basic Research Project （2014CB643403）， National Natural Science Foundation of China （51225401，51374142），and Shanghai Science and Committee （11520500100，14JC1491400）． （）
