表面氧化层对TiMn1.25Cr0.25储氢合金活化性能的影响

通过TiMn1.25Cr0.25合金粉活化前在空气中暴露不同的时间,探讨了表面氧化层的形成对其活化性能的影响。活化测试结果表明：合金的活化难度随着合金在空气中暴露时间的延长而加大。俄歇电子能谱(AES)结果表明,在空气中暴露后的合金表面形成了一层大约6nm-10nm厚的表面氧化层,正是这层氧化层的形成加大了合金的活化难度。扫描电镜(SEM)结果表明合金的活化过程与合金的碎化有着密切的联系。

Effect of Surface Oxide Layer on the Activation Behavior of TiMn1.25Cr0.25 Hydrogen Storage Alloy

The effect of surface oxide layer on the activation behavior of TiMn1.25Cr0.25 alloy is discussed through different exposure time to air prior to activation. The activation results imply that activation of TiMn1.25Cr0.25 alloy becomes more difficult with the time of exposure to air prolonging. The auger Electron Spectroscopy (AES) results present that an about 6 nm~10 nm thick oxide layer is formed on the surface of TiMn1.25Cr0.25 alloy, which is a important factor of effect the activation behavior of this alloy. The scanning electron microcopy (SEM) result show that the activation process of TiMn1.25Cr0.25 alloy is closely related with alloy grain fragmentation.