Mechanically alloyed nanocrystalline hydrogen storage materials

作者：Liang GX^*; Schulz R

来源：Materials Transactions, 2001, 42(8): 1593-1598.

DOI：10.2320/matertrans.42.1593

• mechanical alloying
• nanocrystalline alloys
• hydrogen storage
• hydrogen sorption kinetics

Mechanical alloying and mechanical grinding have been used to synthesize or treat AB, AB(2), and AB(5) type alloys and Mg-based hydrogen storage materials. A nanocrystalline or an amorphous structure was obtained after milling, depending on the system and its composition. The structure and the hydrogen storage properties of various nanocrystalline alloys were investigated. It was found that the activation and kinetics of hydrogen absorption/desorption were improved. However, a severe loss of storage capacity was observed in the AB, AB(2) and AB(5) systems, but not much in Mg-based systems. The storage capacity can be recovered by thermal annealing at elevated temperatures. A preliminary explanation is given for the change of absorption/desorption kinetics and storage capacity.

• 出版日期2001-8