Analysis of structure and p-c-t curve of hydrogenated Ti53Zr27?xNi20Pdx ouasicrystals

Youngsoo Jo, Sang Hwa Lee, Hong Sik Shin, Jae-yong Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The potential application of TiZrNi quasicrystals was evaluated by measuring the pressurecomposition- 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- 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 A 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 -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.

Original languageEnglish
Pages (from-to)7959-7962
Number of pages4
JournalJournal of nanoscience and nanotechnology
Volume13
Issue number12
DOIs
StatePublished - 2013 Dec 1

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Hydrogen
X-Ray Diffraction
Vapor Pressure
Temperature
Hydrogenation

Keywords

  • Hydrogen Storage
  • P -c-T Curves
  • Quasicrystals
  • TiZrNi Alloys

Cite this

Jo, Youngsoo ; Lee, Sang Hwa ; Shin, Hong Sik ; Kim, Jae-yong. / Analysis of structure and p-c-t curve of hydrogenated Ti53Zr27?xNi20Pdx ouasicrystals. In: Journal of nanoscience and nanotechnology. 2013 ; Vol. 13, No. 12. pp. 7959-7962.
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Analysis of structure and p-c-t curve of hydrogenated Ti53Zr27?xNi20Pdx ouasicrystals. / Jo, Youngsoo; Lee, Sang Hwa; Shin, Hong Sik; Kim, Jae-yong.

In: Journal of nanoscience and nanotechnology, Vol. 13, No. 12, 01.12.2013, p. 7959-7962.

Research output: Contribution to journalArticle

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