Effect of the second phase on the initiation of hydrogenation of TiFe1−xMx (M = Cr,Mn) alloys☆

Lee, S.-M.; Perng, Tsong‐Pyng

doi:10.1016/0360-3199(94)90095-7

Cited by 114 publications

(25 citation statements)

References 11 publications

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“…It presents very well activation characteristic, which is consistent with the results of [15]. In this work, we study the influence of further substitution with Co, aiming at flatting the plateau, increasing the equilibrium desorption pressure and improving hydrogen storage capacity without impairing the activation performance.…”

Section: Introductionsupporting

confidence: 87%

“…The introduction of other elements will probably induce to the various types of octahedral sites with different chemical environments, consequently different affinities with hydrogen. As a result, the slope of the plateau pressure in the a þ b region increases, such as Mn substitution [15]. In our previous work, the introduction of Co into TieFeeMn ternary alloy could improve the desorption plateau slope factor.…”

Section: Hydrogen Storage Propertiesmentioning

confidence: 97%

“…In the Mn case, it has been found to be very effective in improving activation characteristic and enhancing the resistance against impure gases. But the substitution results in lower plateau pressure and more sloping plateau region [15], which is unfavorable for hydrogen storage devices and PEMFC (proton exchange membrane fuel cell) field.…”

Section: Introductionmentioning

confidence: 99%

“…Among all those methods, elementary substitution is considered to be most feasible and a lot of investigations have been made so far. When Fe is partially substituted with Ni [11], Co, Al [12], V [13], Pd [14], Mn or Cr [15], the alloy shows a higher activation rate. In the Mn case, it has been found to be very effective in improving activation characteristic and enhancing the resistance against impure gases.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of Co introduction on hydrogen storage properties of Ti–Fe–Mn alloys

et al. 2015

International Journal of Hydrogen Energy

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Section: Introductionsupporting

confidence: 87%

Section: Hydrogen Storage Propertiesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Co introduction on hydrogen storage properties of Ti–Fe–Mn alloys

et al. 2015

International Journal of Hydrogen Energy

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“…8,9) Since, the TiFe alloy has a B2 ordered (CsCl) structure related to a bcc structure in the wide temperature range between under the melting point and ambient temperature, 10) it is expected that the bcc phase in the Ti based alloy could be achieved by including Mo and Fe elements and heat treatment temperature is possibly lowered.…”

Section: Introductionmentioning

confidence: 99%

Protium Absorption and Desorption Properties of bcc Ti-Fe Solid Solution Alloys Stabilized by Mo Addition

et al. 2003

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The present study investigates the effect of Mo addition to the TiFe alloys on a stabilization of bcc phase and their protium absorption and desorption properties. Ti 0:5 Fe 0:5 alloys with more than 10 mol% Mo had CsCl phase and bcc phase, which show single plateaus in the PCT curves and were easily hydrogenated without homogenization. The bcc phase has larger lattice parameter than that of the CsCl phase. TiFe-10 mol% Mo annealed alloys with the Ti/Fe ratio of more than 2 had a bcc phase as a main phase and CsCl as a minor one. The alloys had 3 mass% of the maximum protium capacity and desorbed protium only 1 mass%. The phases of the hydrogenated alloy were fcc and orthorhombic structure, which may be caused by di-hydrides of bcc solid solution and mono-hydrides of CsCl phase, respectively. It is found that the Mo addition to TiFe alloys could stabilize bcc phase and enhances the hydrogenation reaction of the disordered bcc Ti-Fe-Mo phase similar to Ti-Cr-X bcc alloys.

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Synthesis of Nanostructured TiFe Hydrogen Storage Material by Mechanical Alloying via High‐Pressure Torsion

et al. 2020

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TiFe as a room-temperature hydrogen storage material is usually synthesized by ingot casting in the coarse-grained form, but the ingot needs a thermal activation treatment for hydrogen absorption. Herein, nanograined TiFe is synthesized from the titanium and iron powders by severe plastic deformation (SPD) via the high-pressure torsion (HPT). The phase transformation to the TiFe intermetallic is confirmed by X-ray diffraction, hardness measurement, scanning/transmission electron microscopy, and automatic crystal orientation and phase mappings (ASTAR device). It is shown that the HPT-synthesized TiFe can store hydrogen at room temperature with a reasonable kinetics, but it still needs an activation treatment. A comparison between the current results and those achieved on high activity of HPT-processed TiFe ingot suggests that a combination of ingot casting and SPD processing is more effective than synthesis by SPD to overcome the activation problem of TiFe.

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Effect of the second phase on the initiation of hydrogenation of TiFe1−xMx (M = Cr,Mn) alloys☆

Cited by 114 publications

References 11 publications

Effects of Co introduction on hydrogen storage properties of Ti–Fe–Mn alloys

Effects of Co introduction on hydrogen storage properties of Ti–Fe–Mn alloys

Protium Absorption and Desorption Properties of bcc Ti-Fe Solid Solution Alloys Stabilized by Mo Addition

Synthesis of Nanostructured TiFe Hydrogen Storage Material by Mechanical Alloying via High‐Pressure Torsion

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