TY - JOUR
T1 - Electrochemical properties of nanocrystalline Mg2Ni-type alloys prepared by mechanical alloying
AU - Bliznakov, S.
AU - Drenchev, N.
AU - Drenchev, B.
AU - Delchev, P.
AU - Solsona, P.
AU - Spassov, T.
PY - 2005/12/8
Y1 - 2005/12/8
N2 - The electrochemical hydrogen charge/discharge properties of nanocrystalline and nanocrystalline/amorphous Mg2Ni-based alloys with different microstructure (e.g. different average nanocrystals size, different amount of the amorphous phase), prepared by mechanical alloying and mechanical alloying with subsequent controlled annealing, were studied. It was found that larger amount of amorphous phase improved the capacity of the alloy. Alloys with similar nanograin size, but prepared in a different way showed different electrochemical charge/discharge behaviour as well. The as-milled nanocrystalline alloy (7-10 nm), characterized by higher concentration of defects and some amorphous fraction, reveals slightly higher hydrogen capacity than the completely nanocrystalline material (7-10 nm), produced by milling and subsequent annealing. The nanocrystal size reduction in fully crystalline alloys results in noticeable increase of the hydrogen capacity as well. © 2005 Elsevier B.V. All rights reserved.
AB - The electrochemical hydrogen charge/discharge properties of nanocrystalline and nanocrystalline/amorphous Mg2Ni-based alloys with different microstructure (e.g. different average nanocrystals size, different amount of the amorphous phase), prepared by mechanical alloying and mechanical alloying with subsequent controlled annealing, were studied. It was found that larger amount of amorphous phase improved the capacity of the alloy. Alloys with similar nanograin size, but prepared in a different way showed different electrochemical charge/discharge behaviour as well. The as-milled nanocrystalline alloy (7-10 nm), characterized by higher concentration of defects and some amorphous fraction, reveals slightly higher hydrogen capacity than the completely nanocrystalline material (7-10 nm), produced by milling and subsequent annealing. The nanocrystal size reduction in fully crystalline alloys results in noticeable increase of the hydrogen capacity as well. © 2005 Elsevier B.V. All rights reserved.
KW - Electrochemical properties
KW - Mechanical alloying
KW - Mg-Ni alloys
KW - Nanocrystalline
U2 - 10.1016/j.jallcom.2005.01.125
DO - 10.1016/j.jallcom.2005.01.125
M3 - Article
SN - 0925-8388
VL - 404-406
SP - 682
EP - 686
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -