铈对Ti-V-Cr-Fe储氢合金显微组织的影响  

Effect of Cerium Addition on Microstructure of Ti-V-Cr-Fe Hydrogen Storage Alloys

作　　者：黄倬[1] Fermin Cuevas 刘晓鹏[1] 蒋利军[1] Michel Latroche E. Leroy 杜军[1] 

机构地区：[1]北京有色金属研究总院能源材料与技术研究所,北京100088 [2]Chimie Metallurgique des Terres Rares-ICMPE-UMR7182-CNRS, France

出　　处：《中国稀土学报》2009年第1期97-103,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家863基金资助项目(2006AA05Z144);中法政府合作项目(PRA2007-5596RF)资助

摘　　要：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。The microstructure, component and phase structure of Ti24.93 V31.17 Cr37.40 Fe6.50 Cex alloys prepared by ferrovanadium alloys were investigated by EPMA and XRD. The results showed that Ti9.7 Fe3.3 O3 and TIO0.325 phases precipitated in the grain boundary of Ce-free alloy. In the case of the Ce-added alloys, the content of the Ti9.7 Fe3.3 O3 and TIO0.325 phases decreased remarkably with increase of Ce. The addition of Ce prohibited the precipitation of Ti-rich phases, thus improving the chemical homogeneity of metal elements, especially the distribution of Ti. Meanwhile, the average atomic radii and lattice parameters of the BCC phase of the alloys increased gradually with the increase of Ce content, which was beneficial to the improvement of the maximum hydrogen storage capacity of the alloys.

关 键 词：储氢材料 Ti-V固溶体 显微组织 铈 VFe合金 

分 类 号：TG146.4[一般工业技术—材料科学与工程]