(中国科学院 金属研究所， 沈阳材料科学国家实验室， 沈阳 110016)
摘 要: 以ZrFe1.4Cr0.6或TiO2作为催化相，利用球磨和催化反应球磨的方法制备了Mg基复合贮氢材料，研究了其吸放氢动力学特征、 循环性能和抗氧化性能。 即使在较低的温度下， 该复合材料也具有优良的动力学性能。 利用扫描电镜、 能谱分析和X射线衍射分析对该复合材料吸放氢前后的变化进行了表征。研究表明， 覆盖在Mg颗粒表面的细小的ZrFe1.4Cr0.6或TiO2粒子起到快速通过的作用，球磨引入了大量缺陷， 并使部分合金粉末进入Mg基体内部，这都提高了复合材料的吸放氢速率。
关键字: 镁基贮氢材料； 反应球磨； 吸放氢性能
（Shenyang National Laboratory for Materials Science, Institute Metal Research, Chinese Academy of Science, Shenyang, 110016, China）
Abstract:Using ZrFe1.4Cr0.6 or TiO2 (rutile) as catalytic phase, the Mg base composites for hydrogen storage were successfully produced by ball-milling and reactive ball-milling methods. The absorption/desorption kinetics, cycling properties, as well as the resistance to oxidation of the composite were examined. These composites possess excellent kinetic properties, even at moderate temperature. Scanning electron microscopy, energy-dispersive spectrum, and X-ray diffraction were used to characterize the composite before and after hydriding. The fine ZrFe1.4Cr0.6 or TiO2 particles covering Mg particles act as a “path”, a significant amount of imperfections and some alloy powder in the Mg matrix introduced by ball milling are all contributed to the enhanced absorption/desorption rate.
Key words: Mg base hydrogen storage material; reactive ball-milling; absorption/desorption property
