| Autor: |
Koji Tanaka, Makoto Tsukahara, Shiomi Kikuchi, Nobuhiko Takeichi, Hideaki Tanaka, Nobuhiro Kuriyama, Tamotsu T. Ueda, Hiroshi Miyamura |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
Materials Science Forum. :1581-1584 |
| ISSN: |
1662-9752 |
| DOI: |
10.4028/www.scientific.net/msf.561-565.1581 |
| Popis: |
Super-laminates have been attracting attention since co-authors Ueda et al. reported that Mg/Cu super-laminates showed reversible hydrogenation and dehydrogenation at 473K. The Mg/Cu super-laminates were prepared by a repetitive fold and roll method. Initial activation at 573 K led the super-laminates to absorb hydrogen at 473K. TEM observations of micro/nano-structures in the super-laminates and Mg2Cu powder were performed in order to clarify the process of hydrogenation and dehydrogenation at 473K. The as-rolled Mg/Cu super-laminates have laminated structures in size of sub-micrometer thickness composed of Mg and Cu layers with dense lattice defects. The super-laminates after initial activation keep laminated structure and have uniformly distributed pores with a sub-micrometer diameter. It is considered that these micro/nano-structures of Mg/Cu super-laminates lead to lower dehydrogenation temperature and better kinetics. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
