论文部分内容阅读
使用V-Fe合金为原料制备了Ti24.93V31.17Cr37.40Fe6.50Cex固溶体储氢合金,采用EPMA和XRD对合金显微组织和相结构进行了分析。结果表明,不含Ce的Ti24.93V31.17Cr37.40Fe6.50合金由BCC主相和分布于晶界的Ti9.7Fe3.3O3和TiO0.325相组成。当Ce添加于合金后,随着合金中Ce含量的增加,Ti9.7Fe3.3O3和TiO0.325相含量明显减少。Ce的添加抑制了富Ti相的析出,促进了合金元素尤其是Ti的均匀分布。此外,随Ce含量增加,合金BCC主相平均原子半径和晶格常数随之增大,有利于增大合金的储氢容量。
Ti24.93V31.17Cr37.40Fe6.50Cex solid solution hydrogen storage alloy was prepared by using V-Fe alloy as raw material. The microstructure and phase structure of the alloy were analyzed by EPMA and XRD. The results show that the Ce-free Ti24.93V31.17Cr37.40Fe6.50 alloy consists of the main phase of BCC and Ti9.7Fe3.3O3 and TiO0.325 phases distributed in the grain boundaries. When Ce is added to the alloy, the contents of Ti9.7Fe3.3O3 and TiO0.325 are obviously decreased with the increase of Ce content in the alloy. The addition of Ce suppresses the precipitation of Ti-rich phase and promotes the uniform distribution of alloying elements, especially Ti. In addition, with the increase of Ce content, the average atomic radius and lattice constant of the main phase of the BCC alloy increase, which is beneficial to increase the hydrogen storage capacity of the alloy.