Shuang Yang , Zifeng Luo , Guo Yang , Lijun Lv , Linhua Xu , Haiyan Leng , Xingbo Han , Jianhui Zhu , Wei Liu , Pengfei Zhu , Jing Xu
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引用次数: 0
Abstract
As a representative of non-evaporative getter, Zr–V–Fe has gained widespread attention due to its advantages including low activation temperatures and rapid hydrogen absorption rates. In this study, we investigated the impact of La and Ce doping on the thermodynamic, kinetic, and activation properties of Zr7V5Fe alloy. X-ray diffraction analysis shows that rare earth doping causes a decrease in the cell volume of both the ZrV2 and α-Zr phases of Zr7V5Fe alloy, which results in an increase in the plateau pressure of the alloys. The kinetic curves illustrate that rare earth doping leads to a coarse α-Zr phases and a larger particle size after activation, resulting in a decrease in the hydrogen absorption kinetic properties. As for the activation process, the rare earth doped alloys exhibit excellent activation with shorter incubation periods. X-ray photoelectron spectroscopy investigations reveal that Zr and V are initially in a highly oxidized state. As the heating temperature increases, they undergo a transition from oxidation state to metal state. The content of metal Zr in rare earth doped alloys is higher than that in undoped alloys at 250 °C, primarily due to rare earth elements' affinity for oxygen.
期刊介绍:
The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field.
The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.