The influence of microstructure on hydrogen absorption properties of Ti–Cr–V alloys

Itoh, Hideaki; Arashima, Hironobu; Kubo, Katashi; Kabutomori, Toshiki

doi:10.1016/s0925-8388(01)01530-4

Cited by 41 publications

(30 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This informed the choice of the base alloy Ti 25 V 40 Cr 35 , which falls within the region. The choice to use Fe as the additive was made because of its relatively low cost.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy

et al. 2017

View full text Add to dashboard Cite

Abstract:In this work, we investigated the effects of heat treatment on the microstructure, hydrogen storage characteristics and corrosion rate of a Ti 34 V 40 Cr 24 Fe 2 alloy. The arc melted alloy was divided into three samples, two of which were separately quartz-sealed under vacuum and heated to 1000 • C for 1 h; one of these samples was quenched and the other furnace-cooled to ambient temperature. The crystal structures of the samples were studied via X-ray diffractometry and scanning electron microscopy. Hydrogenation/dehydrogenation characteristics were investigated using a Sievert apparatus. Potentiostat corrosion tests on the alloys were performed using an AutoLab ® corrosion test apparatus and electrochemical cell. All samples exhibited a major body-center-cubic (BCC) and some secondary phases. An abundance of Laves phases that were found in the as-cast sample reduced with annealing and disappeared in the quenched sample. Beside suppressing Laves phase, annealing also introduced a Ti-rich phase. The corrosion rate, maximum absorption, and useful capacities increased after both heat treatments. The annealed sample had the highest absorption and reversible capacity. The plateau pressure of the as-cast alloy increased after quenching. The corrosion rate increased from 0.0004 mm/y in the as-cast sample to 0.0009 mm/y after annealing and 0.0017 mm/y after quenching.

show abstract

“…This informed the choice of the base alloy Ti 25 V 40 Cr 35 , which falls within the region. The choice to use Fe as the additive was made because of its relatively low cost.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy

et al. 2017

View full text Add to dashboard Cite

show abstract

“…However, these alloys suffer from disadvantages like difficult activation treatment, poor kinetics, large hysteresis, low cyclic stability, high desorption temperature and high cost. In order to improve the hydrogen storage characteristics of Ti-Cr-V system, all these drawbacks has been overcome by the preparation of these alloys by using HEBM, heat treatment and by the addition of different catalysts in the alloys [14][15][16][17][18] . The substitution of Ti, V or Cr with elements like Zr, Co, Fe or Mn leads to drastic changes in the hydrogen storage properties of the alloys due to the formation of secondary Laves phases that coexist with the BCC phase 12,13 .…”

Section: Introductionmentioning

confidence: 99%

Mg-based Nanocomposites for Hydrogen Storage Containing Ti-Cr-V Alloys as Additives

et al. 2016

View full text Add to dashboard Cite

In this study, we have investigated the synthesis, microstructure and hydrogen storage properties of Mg-based nanocomposites containing different concentrations of TiCrV and TiCr 1.2 V 0.8 alloys. The Mg-based nanocomposites of Mg containing Ti-Cr-V additives were prepared by reactive milling (RM) under hydrogen atmosphere. The structural characterization revealed the presence of the β-MgH 2 , γ-MgH 2 and BCC phases in the powders samples after RM. In addition, a very refined and homogenous microstructure with average MgH 2 crystallite size of around 10-12 nm was observed, including a nanometric dispersion of the additives in the magnesium hydride matrix. The doping with TiCrV and TiCr 1,2 V 0,8 greatly improves the hydrogen desorption behavior of Mg in comparison with the sample without additive, resulting in the lowest onset temperature (240 °C) for the sample containing 5%mol. of TiCrV. Very fast absorption and desorption kinetics at 275 °C and 300 °C (7 minutes and 5 minutes for full desorption and absorption, respectively) were observed in the samples containing TiCrV and TiCr 1,2 V 0,8 without any notable difference between the type of additive used in comparison with the pure sample. However, a slight reduction in hydrogen capacity is observed in the mixtures than for the pure sample (6.7 wt.% against 7.3 wt.%).

show abstract

“…Ti-or V-based solid solution alloys with a BCC structure are known to have the largest reversible hydrogen capacity at around room temperature, close to 3 mass%. [1][2][3] This kind of alloys form dihydrides with a CaF 2 structure, where the atomic ratio of hydrogen and metal is close to two.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Vibrational Excitation Spectra of CaF<SUB>2</SUB>-Type Metal Hydrides Synthesized from Ti-Based BCC Solid Solution Alloys

2011

View full text Add to dashboard Cite

Hydrogen vibrational excitation was studied for CaF 2 -type metal hydrides synthesized from Ti-based BCC solid solution alloys using inelastic incoherent neutron scattering (IINS). Ti 1:0 V 1:1 Mn 0:9 H 4:5 and Ti 0:7 V 1:2 Cr 1:1 H 4:8 showed IINS spectra similar to that reported for TiH 2 . The first three peaks were isolated but the higher excitation peaks were not clear. Analysis of the spectra using curve-fitting with Gauss functions revealed that the hydrogen vibration of Ti 1:0 V 1:1 Mn 0:9 H 4:5 is harmonic but that of the Ti 0:7 V 1:2 Cr 1:1 H 4:8 is deviated from harmonic, which reflects a trumpet-type potential. The relation between metal-hydrogen distance and vibrational excitation energy for the above two hydrides and Ti 1:1 Cr 1:4 Mo 0:3 H $5 was compared with a series of CaF 2 -type binary metal hydrides. All the hydrides of the Ti-based alloys had lower vibrational excitation energies than the binary metal hydrides for the corresponding metal-hydrogen distances.

show abstract

The influence of microstructure on hydrogen absorption properties of Ti–Cr–V alloys

Cited by 41 publications

References 3 publications

Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy

Hydrogen Storage Characteristics and Corrosion Behavior of Ti24V40Cr34Fe2 Alloy

Mg-based Nanocomposites for Hydrogen Storage Containing Ti-Cr-V Alloys as Additives

Hydrogen Vibrational Excitation Spectra of CaF<SUB>2</SUB>-Type Metal Hydrides Synthesized from Ti-Based BCC Solid Solution Alloys

Contact Info

Product

Resources

About