Amorphous magnesium-nickel hydrogen-storage alloys synthesized by sputtering

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:186759

Holtz, R L ^[1]; Imam, M A; Meyn, D A ^[2]

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1. Geo-Centers, Inc., Fort Washington, MD (United States)
2. Naval Research Lab., Washington, DC (United States). Materials Science and Technology Div.

Magnesium-based alloys are potentially important hydrogen-storage materials because of their light weight and high specific hydrogen capacities. In thin film form, it should be possible to engineer the hydride reaction kinetics and protect the materials from oxidation by applying passivation or catalytic layers. In the present work, thin films of Mg-Ni alloys were deposited by cosputtering onto a liquid nitrogen cooled substrate. The films were amorphous as deposited. Upon hydriding at 354 C in 2.1 MPa of hydrogen, the films crystallize and fragment into fine powders. Hydrogen uptakes very close to the theoretical maximum are obtained for Mg-Ni alloys with 15, 33, and 60 atomic percent nickel.

• OSTI ID: 186759
• Report Number(s): CONF-950201--; ISBN 0-87339-316-3
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
36 MATERIALS SCIENCE
AMORPHOUS STATE
CRYSTALLIZATION
DEHYDRIDATION
DEPOSITION
EXPERIMENTAL DATA
HYDRIDATION
HYDROGEN STORAGE
MAGNESIUM ALLOYS
MAGNESIUM NITRIDES
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL NITRIDES
OXIDATION
REACTION KINETICS
SCANNING ELECTRON MICROSCOPY
SPUTTERING
THIN FILMS
X-RAY DIFFRACTION