Analysis of Structure and P-c-T Curve of Hydrogenated Ti53Zr27-xNi20Pdx Quasicrystals

Title
Analysis of Structure and P-c-T Curve of Hydrogenated Ti53Zr27-xNi20Pdx Quasicrystals
Author
김재용
Keywords
TiZrNi Alloys; Quasicrystals; P-c-T Curves; Hydrogen Storage
Issue Date
2013-12
Publisher
AMER SCIENTIFIC PUBLISHERS, 26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA
Citation
Journal of Nanoscience and Nanotechnology, Vol.13, No.12 [2013], p7959 ~ 8021
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.
URI
http://hdl.handle.net/20.500.11754/45982https://www.ingentaconnect.com/content/asp/jnn/2013/00000013/00000012/art00032;jsessionid=1rf87w34u5mia.x-ic-live-03
ISSN
1533-4880; 1533-4899
DOI
10.1166/jnn.2013.8124
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE