Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
In order to optimize hydrogen storage properties of bcc Ti–V–Cr alloys it was found that alloying with a few 4 at% of Zr 7Ni 10 results in acceleration the hydrogen sorption kinetics in the composite material. The novel intergranular phase plays a role of gate for hydrogen, leading parallel to its easy decrepitate, thus enhancing fast formation of Ti–V–Cr hydrides. Nevertheless, the question on how such a composite microstructure affects hydrogen mobility in the material is still open. Here we report on the results of the studies of hydrogen self-diffusion in hydrogenated (TiCr 1.8) 1-xV x based alloys (x = 0.2, 0.4, 0.6 and 0.8) carried out using proton nuclear magnetic resonance diffusiometry in a static field gradient . For all compounds the method has proved itself as a powerful tool to probe the microstructure of the multicomponent alloys with inhomogeneous element distribution in a few micrometer scale. It has been found that addition of Zr 7Ni 10 lowers the activation energy of hydrogen motion in (TiCr 1.8) 1-xV x alloys and leads appear two different diffusion areas. They can be associated with a redistribution of elements within the intra-granular phase due to opposite substitution of Ti and Ni atoms during synthesis and blurring the boundaries between the intra-granular and inter-granular phases.
| Язык оригинала | английский |
|---|---|
| Страницы (с-по) | 7929-7937 |
| Число страниц | 9 |
| Журнал | International Journal of Hydrogen Energy |
| Том | 45 |
| Номер выпуска | 14 |
| Дата раннего онлайн-доступа | 13 июл 2019 |
| DOI | |
| Состояние | Опубликовано - 2020 |
ID: 43652705