Abstract
Mechanical alloying of Ti45Zr38-xNi17+x and Ti45-x;Zr38Ni17+x(0 ≤ x ≤ 8) elemental powders produced an amorphous phase, but subsequent annealing converted the amorphous phase into an icosahedral quasicrystal phase, along with a Ti2Ni-type phase. The discharge capacities, measured in a three-electrode cell at room temperature for both the amorphous and quasicrystal electrodes, increased with increasing Ni substitution for Zr or Ti. The highest discharge capacities, which were about 60 mAh/g for the amorphous electrode and 100 mAh/g for the quasicrystal electrode, were obtained from (Ti 45Zr30Ni25) after substitution of Ni for Zr. For the Ti45Zr30Ni25 composition, the discharge performance of the quasicrystal electrode was stable over charge/discharge cycling, but that of the amorphous electrode gradually decreased with cycling. The structure of the quasicrystal phase in the electrodes was stable, even after 15 charge/discharge cycles, but the amorphous phase converted to a (Ti, Zr)H2 f.c.c. hydride.
| Original language | English |
|---|---|
| Pages (from-to) | 1575-1582 |
| Number of pages | 8 |
| Journal | Journal of Materials Research |
| Volume | 25 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2010 Aug |
Fingerprint
ASJC Scopus subject areas
- Materials Science(all)
- Mechanical Engineering
- Mechanics of Materials
- Condensed Matter Physics
Cite this
Synthesis of Ti-Zr-Ni amorphous and quasicrystal powders by mechanical alloying, and their electrochemical properties. / Takasaki, Akito; Okuyama, Tetsuya; Szmyd, Janusz S.
In: Journal of Materials Research, Vol. 25, No. 8, 08.2010, p. 1575-1582.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis of Ti-Zr-Ni amorphous and quasicrystal powders by mechanical alloying, and their electrochemical properties
AU - Takasaki, Akito
AU - Okuyama, Tetsuya
AU - Szmyd, Janusz S.
PY - 2010/8
Y1 - 2010/8
N2 - Mechanical alloying of Ti45Zr38-xNi17+x and Ti45-x;Zr38Ni17+x(0 ≤ x ≤ 8) elemental powders produced an amorphous phase, but subsequent annealing converted the amorphous phase into an icosahedral quasicrystal phase, along with a Ti2Ni-type phase. The discharge capacities, measured in a three-electrode cell at room temperature for both the amorphous and quasicrystal electrodes, increased with increasing Ni substitution for Zr or Ti. The highest discharge capacities, which were about 60 mAh/g for the amorphous electrode and 100 mAh/g for the quasicrystal electrode, were obtained from (Ti 45Zr30Ni25) after substitution of Ni for Zr. For the Ti45Zr30Ni25 composition, the discharge performance of the quasicrystal electrode was stable over charge/discharge cycling, but that of the amorphous electrode gradually decreased with cycling. The structure of the quasicrystal phase in the electrodes was stable, even after 15 charge/discharge cycles, but the amorphous phase converted to a (Ti, Zr)H2 f.c.c. hydride.
AB - Mechanical alloying of Ti45Zr38-xNi17+x and Ti45-x;Zr38Ni17+x(0 ≤ x ≤ 8) elemental powders produced an amorphous phase, but subsequent annealing converted the amorphous phase into an icosahedral quasicrystal phase, along with a Ti2Ni-type phase. The discharge capacities, measured in a three-electrode cell at room temperature for both the amorphous and quasicrystal electrodes, increased with increasing Ni substitution for Zr or Ti. The highest discharge capacities, which were about 60 mAh/g for the amorphous electrode and 100 mAh/g for the quasicrystal electrode, were obtained from (Ti 45Zr30Ni25) after substitution of Ni for Zr. For the Ti45Zr30Ni25 composition, the discharge performance of the quasicrystal electrode was stable over charge/discharge cycling, but that of the amorphous electrode gradually decreased with cycling. The structure of the quasicrystal phase in the electrodes was stable, even after 15 charge/discharge cycles, but the amorphous phase converted to a (Ti, Zr)H2 f.c.c. hydride.
UR - http://www.scopus.com/inward/record.url?scp=77955962011&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955962011&partnerID=8YFLogxK
U2 - 10.1557/jmr.2010.0202
DO - 10.1557/jmr.2010.0202
M3 - Article
VL - 25
SP - 1575
EP - 1582
JO - Journal of Materials Research
JF - Journal of Materials Research
SN - 0884-2914
IS - 8
ER -