Hydrogen-Storage Properties and Structure Characterization of Melt-Spun and Annealed Mg-Ni-Nd Alloy
| Autor: | Jingtian Yin, Kazuhide Tanaka, Nobuo Tanaka |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Hydrogen Annealing (metallurgy) Mechanical Engineering Alloy Analytical chemistry chemistry.chemical_element engineering.material Condensed Matter Physics Catalysis Chemical kinetics Crystallography Hydrogen storage Electron diffraction chemistry Mechanics of Materials Transmission electron microscopy engineering General Materials Science |
| Zdroj: | MATERIALS TRANSACTIONS. 43:417-420 |
| ISSN: | 1347-5320 1345-9678 |
| DOI: | 10.2320/matertrans.43.417 |
| Popis: | The hydriding/dehydriding characteristics of a Mg-rich Mg-Ni-Nd alloy produced by melt-spinning and subsequent annealing have been investigated. This alloy absorbs ∼ 4.7 mass% hydrogen (H/M∼ 1.5) quickly between 423 and 573 K and wholly desorbs it at moderate speeds above 453 K. Transmission electron microscope observations and selected-area electron diffraction analyses of this alloy before and after hydriding demonstrate that it consists of multiple phases of Mg 2 Ni and Nd-hydride precipitated uniformly in a nano-structured Mg matrix. The fast reaction kinetics is caused by an interplay between a catalytic action of the Nd-hydrides and the surrounding nano-sized Mg grains which quickly store or evolve hydrogen across the interfaces. |
| Databáze: | OpenAIRE |
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