Pressure-composition-temperature curves and structure stability induced by hydrogen in TiZrNi quasicrystals
- Title
- Pressure-composition-temperature curves and structure stability induced by hydrogen in TiZrNi quasicrystals
- Author
- 김재용
- Keywords
- quasicrystals; TiZrNiPd; hydrogen storage; P-c-T curves
- Issue Date
- 2011-07
- Publisher
- TAYLOR & FRANCIS LTD, 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND
- Citation
- PHILOSOPHICAL MAGAZINE,Vol.91 No.19-21 [2011],2937-2943
- Abstract
- To evaluate the potential applications of Ti-based quasicrystals as hydrogen storage materials, metastable Ti53-xZr27Ni20Pdx (x = 0, 2, 4, 6) quasicrystals were prepared by a rapid quenching method and equilibrium vapor pressures for hydrogen were measured. Pressure-composition-temperature curves measured in Pd-added TiZrNi quasicrystals revealed a significantly increased equilibrium vapor pressure for hydrogen with increasing Pd concentration, while hydrogen loading capacity decreased. After hydrogen absorption, no hydride phase was found for samples made with less than x = 4. The main peaks shifted to the lower angle of 2 in X-ray diffraction patterns, demonstrating that the quasi-lattice constants increased from 5.13 to 5.38 angstrom after hydrogenation. The quasi-lattice constants linearly expanded with increasing absorption amount of hydrogen. Interestingly, analyzing the full width at half maximum values of the main peaks in the X-ray diffraction patterns showed that the coherence lengths of the quasicrystals significantly increased from 120 to 240 angstrom after hydrogenation, presumably due to kinetic rather than thermal factors.
- URI
- http://eds.b.ebscohost.com/eds/detail/detail?vid=0&sid=d782795d-7812-4557-ae9d-e731bd56da8d%40sessionmgr102&bdata=Jmxhbmc9a28mc2l0ZT1lZHMtbGl2ZQ%3d%3d#AN=000290670100063&db=edswschttp://hdl.handle.net/20.500.11754/35898
- ISSN
- 1478-6435; 1478-6443
- DOI
- 10.1080/14786435.2010.543093
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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