【作者】 赵相玉； 张芙蓉； 丁毅； 马立群；

【Author】 ZHAO Xiang-yu , ZHANG Fu-rong, DING Yi, MA Li-qun (College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009,China)

【机构】 南京工业大学材料科学与工程学院；

【摘要】 使用行星式球磨机,用机械合金化法制备了Ti60Zr15Ni15Cu10储氢合金。采用X射线衍射仪XRD、示差扫描量热计DSC分析了球磨粉末的物相、晶粒尺寸的变化;采用扫描电子显微镜SEM、能谱EDS分析了机械合金化过程中粉末的形貌和成分;并对球磨粉末进行了P-C-T曲线测量。研究结果表明,粉末晶粒尺寸随球磨时间增加不断减小。球磨120 h粉末含有大量非晶相。粉末颗粒中有明显的冷焊合层状结构。随球磨时间增加,层状结构的层厚不断减小,颗粒中的元素分布趋于均匀,合金化过程中的冷焊合和断裂作用逐渐趋于平衡。合金的最大吸氢量物质的量为1．63％,纳米结构粉末的吸氢量高于非晶结构粉末。更多还原

【Abstract】 Mechanical alloying was used to synthesis the Ti60Zr15Ni15Cu10 hydrogen storage alloy in a planetary mill. The structure of phases and grain size of the milled powders were determined by XRD and DSC. The microstructure and composition of the powders were examined by SEM and EDS. P-C-T curves of the powders were also studied. The results show that the grain size of the powders decreases with the increase of milling time. There is much amorphous phase in the sample milled for 120 h. There is a cold welding layer structure in the powders. With the increase of milling time, the thickness of the cold welding layers decreases, the distribution of the elements in the powders tends to be uniform, the cold welding process and the fracture process tend to be balance gradually. The maximum hydrogen storage capacity of the as-milled alloy was 1.63% . The hydrogen storage capacity of the powders with nanocrystalline structure is higher than that of the powders with amorphous structure.更多还原