Ti/Zr-Based Quasicrystals - Formation, Structure And Hydrogen Storage Properties

Low Temperature Annealing ◽

Icosahedral Quasicrystals ◽

Crystal Phases ◽

Complex Crystal ◽

AbstractMost common in Al-3d transition metal(TM) alloys, icosahedral quasicrystals (i-phase) are also found frequently in Ti/Zr-TM alloys. The Ti-TM-Si-O quasicrystals are metastable, produced only by rapid quenching, and are extremely disordered. In contrast, Ti-Zr-Ni i-phases are well ordered and stable, produced by relatively low temperature annealing, nearly 300°C below the melting temperature. Important for both basic and practical reasons, Ti/Zr-based quasicrystals can absorb significant quantities of hydrogen, up to two hydrogen atoms for each metal atom. The formation and structures of these quasicrystals and closely related complex crystal phases are discussed. The hydrogenation properties of these quasicrystals are presented and shown to be competitive with materials in current use for hydrogen storage and battery applications. Results from recent studies using hydrogen as a probe of the local structure of the quasicrystal and crystal approximant are presented.

Synthesis of Quasicrystal Phases by Mechanical Alloying of Ti45+xZr38-XNi17 (-4≤ X ≤16) Powder Mixtures, and Their Hydrogen Storage Properties

MRS Proceedings ◽

10.1557/proc-805-ll10.4 ◽

2003 ◽

Vol 805 ◽

Cited By ~ 1

Author(s):

Akito Takasaki ◽

Naoki Imai ◽

Kenneth F. Kelton

Keyword(s):

Mechanical Alloying ◽

Hydrogen Desorption ◽

Lattice Parameter ◽

Hydrogen Atoms ◽

Powder Mixtures ◽

Crystal Phases ◽

Powder Compacts ◽

Storage Properties ◽

Type Crystal

ABSTRACTMechanical alloying of Ti45+xZr38-xNi17 (-4 ≤ x ≤ 16) elemental powder mixtures leads to the formation the amorphous phase, but subsequent annealing at 833 K causes the formation of icosahedral (i) quasicrystal and the Ti2Ni-type crystal phases. The α-Ti phase is also produced in Ti-rich powders after annealing. Both the quasilattice constant of the i-phase and the lattice parameter of the Ti2Ni-type crystal phase decrease monotonically with increasing substituted amount of Ti because of the smaller radius of the Ti atom. The maximum hydrogen concentration in the i-phase in all powder compacts, after electrochemical hydrogenation in a KOH solution, is almost the same, about 63 at% ([H] / [M] ≈ 1.7). The onset temperature of hydrogen desorption is about 570 K (at a heating rate of 5 K/min) for all powders, but the temperature for the maximum hydrogen desorption rate increases with increasing Ti concentration in the powders, suggesting that some hydrogen atoms might be more strongly bound in the quasilattice where the original Zr sites become occupied by Ti atoms.

Electrochemical hydrogen storage properties of TixV65−xNi35 (x=45, 55) alloys produced by rapid-quenching

Materials Letters ◽

10.1016/j.matlet.2014.11.108 ◽

2015 ◽

Vol 141 ◽

pp. 291-293 ◽

Cited By ~ 2

Author(s):

Chaofan Liu ◽

Wanqiang Liu ◽

Limin Wang ◽

Fei Liang ◽

Jing Lin ◽

...

Keyword(s):

Hydrogen Storage ◽

Rapid Quenching ◽

Electrochemical Hydrogen Storage ◽

Revealing the Role of Defects in Graphene Oxide on Evolution of Magnesium Nanocrystals and the Resulting Effects on Hydrogen Storage

Journal of Materials Chemistry A ◽

10.1039/d0ta12556c ◽

2021 ◽

Author(s):

Dong Ju Han ◽

Sangtae Kim ◽

Eun Seon Cho

Keyword(s):

Graphene Oxide ◽

Hydrogen Storage ◽

Diffusion Path ◽

Hydrogen Atoms ◽

Intensive Research ◽

Size And Morphology ◽

The hydrogen storage properties of magnesium (Mg) considerably rely on the size and morphology of Mg particles that determine the diffusion path for hydrogen atoms. Despite the intensive research on...

Enhanced hydrogen storage properties of MgH2 with numerous hydrogen diffusion channels provided by Na2Ti3O7 nanotubes

Journal of Materials Chemistry A ◽

10.1039/c7ta00566k ◽

2017 ◽

Vol 5 (13) ◽

pp. 6178-6185 ◽

Cited By ~ 52

Author(s):

Liuting Zhang ◽

Lixin Chen ◽

Xiulin Fan ◽

Xuezhang Xiao ◽

Jiaguang Zheng ◽

...

Keyword(s):

Hydrogen Storage ◽

Hydrogen Diffusion ◽

Hydrogen Atoms ◽

Na2Ti3O7 NTs homogeneously distributed in MgH2 offer numerous diffusion channels to significantly accelerate the transportation of hydrogen atoms.

Conversion of multi-layered Mg-based carrier to hydrogen storage performance

MATEC Web of Conferences ◽

10.1051/matecconf/201823805002 ◽

2018 ◽

Vol 238 ◽

pp. 05002

Author(s):

Ningning Zhou ◽

Dongying Ju

Keyword(s):

Hydrogen Storage ◽

Trace Element ◽

Hydrogen Atoms ◽

Mixed Powder ◽

Gas Concentration ◽

Experimental Process ◽

Covering Method ◽

Hydrogen Storage Performance ◽

The mixed powder method and covering method were adopted to prepare a composite that has hydrogen storage properties. In the experimental process, the alloy phases Mg2Ni and NiTi generated regularly; the penetration of the hydrogen atoms to the material was considered as the adsorption of the material to the hydrogen atoms; the original thermodynamic equation was edited; the crystal phases were optimized by adjusting the parameters about the material composition and gas concentration, so that providing advantageous channels of the hydrogen atoms in and out to improve the hydrogen storage properties. The results showed that integer multiples adjustment to trace element Ti could make hydrogen storage properties maximizing optimize and have controllability for the capacity and rate of hydrogen storage according to the newly editing equation. The innovation was to edit out equation that can improve the hydrogen storage properties through adjusting three parameters of trace element Ti, adsorption and penetration to find the most optimal condition improving the hydrogen storage properties.