Analysis of Structure and P-c-T Curve of Hydrogenated Ti53Zr27-xNi20Pdx Quasicrystals
- Authors
- Jo, Youngsoo; Lee, Sang-Hwa; Shin, Hong Sik; Kim, Jaeyong
- Issue Date
- Dec-2013
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- TiZrNi Alloys; Quasicrystals; P-c-T Curves; Hydrogen Storage
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.13, no.12, pp.7959 - 7962
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 13
- Number
- 12
- Start Page
- 7959
- End Page
- 7962
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/143649
- DOI
- 10.1166/jnn.2013.8124
- ISSN
- 1533-4880
- Abstract
- The potential application of TiZrNi quasicrystals was evaluated by measuring the pressure-composition-temperature curves after replacing Zr by Pd to the limit maintaining the host structure for the samples made with Ti53Zr27-xNi20Pdx, where 0 <= x <= 8. The results of X-ray diffraction data revealed that the samples keep the pure quasicrystal structure to the maximum value of x = 8. All diffracted peaks uniformly shifted to the low angle of 2 theta in X-ray diffraction pattern suggesting that hydrogen atoms homogeneously diffuse in the quasicrystals and uniformly expand the quasilattice constants without modification of the structure. After hydrogenation at elevated temperature, the quasi-lattice constants increased from 5.12 to 5.34 angstrom for the samples made with x = 0 without appearing an impurity phase. When Zr was replaced by 8 at.% of Pd, the equilibrium vapor pressures significantly increased to 3.41 from 0.41 Torr at 300 degrees C although the total amount of hydrogen decreased as increasing Pd concentration. These results demonstrate that Pd will play a critical role in application for the TiZrNi quasicrystals as hydrogen storage materials.
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