Authors: Lee, Sang-Hwa; Choi, Soo-Bin; Ito, Eisuke; Kim, Jae-Yong

Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 11, November 2010 , pp. 7680-7683(4)

Publisher: American Scientific Publishers

Abstract:

When hydrogen atoms slowly diffuse into a metastable structure, a coherence length of thin TiZrNi quasicrystal metallic ribbons is increased. Improved atomic order with addition of hydrogen is an uncommon phenomenon in metals, and may reflect the unordinary structural property of quasicrystals. Metastable TiZrNi quasicrystals prepared by rapid quenching of molten ingots were hydrogenated in a low pressure of hydrogen (lower than 1000 Torr) at high temperature. After completion of the pressure-composition-temperature measurements between 200 to 300 °C, X-ray diffraction data revealed that the full width at half maximum values of the diffraction peaks were decreased suggesting that the quasicrystal phase may stabilized by hydrogen inclusion. Annealing of the same sample at 200 °C without hydrogen yields no change of the relative intensity of diffraction peaks.

Keywords: QUASICRYSTAL; HYDROGEN; TI-BASED ALLOYS; STRUCTURAL STABILITY; P-C-T

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2010.2782

Publication date: 2010-11-01

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