Effect of Mn, Ti/Cr ratio, and heat treatment on hydrogen storage properties of TI–V–CR–MN alloys
| Autor: | Sheng Long Lee, Yu Cheng Wu, Hui Yun Bor, Cheng Yu Chou, Rong Ruey Jeng |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Hydrogen Annealing (metallurgy) Alloy Metallurgy technology industry and agriculture General Engineering Analytical chemistry chemistry.chemical_element engineering.material equipment and supplies Hydrogen desorption Hydrogen storage Plateau pressure chemistry Desorption engineering Hydrogen absorption |
| Zdroj: | Journal of the Chinese Institute of Engineers. 34:601-608 |
| ISSN: | 2158-7299 0253-3839 |
| DOI: | 10.1080/02533839.2011.577595 |
| Popis: | This study elucidates the effects of adding Mn, the Ti/Cr ratio, and high-temperature annealing on the hydrogen absorption–desorption properties of Ti–V–Cr–Mn body-centered cubic alloys. The hydrogen storage properties of alloys are also modified by integrating the positive effects. X-ray diffraction analysis indicates that the lattice parameters decrease linearly with an increasing Mn content. Additionally, the reversible hydrogen desorption capacity is increased as the Mn content is increased from 0 at.% to 15 at.%, without apparently degrading hydrogen absorption capacities. Despite increasing the desorption pressure, the decrease of Ti/Cr ratio slightly reduces the absorption and desorption capacities. The Ti33V33Cr19Mn15 alloy has a reversible hydrogen desorption capacity as high as 2.48 mass% at 80°C. Moreover, the as-heat-treated (1200°C, 10 h) Ti31V33Cr21Mn15 alloy has a flatter plateau pressure and a higher amount of desorption pressure (greater than 1 atm) than those of the as-cast alloy. |
| Databáze: | OpenAIRE |
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