Effects of desorption temperature and substitution of Fe for Cr on the hydrogen storage properties of Ti0.32Cr0.43V0.25Ti0.32Cr0.43V0.25 alloy

Yoo, Jeong-Hyun; Shim, Gunchoo; Cho, Sung-Wook; Park, Chan‐Jin

doi:10.1016/j.ijhydene.2007.01.012

Cited by 56 publications

(27 citation statements)

References 17 publications

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“…This is verified by EDS semiquantitative analysis whose values are shown in Table 1. Therefore less Ti atoms are in bcc phase, this is in accordance with Vegard law which describes the increase or decrease of the crystal lattice parameter as a function of the concentrations of the constituent elements 7 .…”

Section: Analysis and Resultssupporting

confidence: 77%

Hydrogen absorption/desorption properties in the TiCrV based alloys

Martínez

Santos

2012

Mat. Res.

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Three different Ti-based alloys with bcc structure and Laves phase were studied. The TiCr 1.1 V 0.9 , TiCr 1.1 V 0.45 Nb 0.45 and TiCr 1.1 V 0.9 + 4%Zr 7 Ni 10 alloys were melted in arc furnace under argon atmosphere. The hydrogen absorption capacity was measured by using aparatus type Sievert's. Crystal structures, and the lattice parameters were determined by using X-ray diffraction, XRD. Microestructural analysis was performed by scanning electron microscope, SEM and electron dispersive X-ray, EDS. The hydrogen storage capacity attained a value of 3.6 wt. (%) for TiCr 1.1 V 0.9 alloy in a time of 9 minutes, 3.3 wt. (%) for TiCr 1.1 V 0.45 Nb 0.45 alloy in a time of 7 minutes and 3.6 wt. (%) TiCr 1.1 V 0.9 + 4%Zr 7 Ni 10 with an increase of the hydrogen absorption kinetics attained in 2 minutes. This indicates that the addition of Nb and 4%Zr 7 Ni 10 to the TiCrV alloy acts as catalysts to accelerate the hydrogen absorption kinetics.

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Section: Analysis and Resultssupporting

confidence: 77%

Hydrogen absorption/desorption properties in the TiCrV based alloys

Martínez

Santos

2012

Mat. Res.

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“…However, the high material cost of BCC alloys and their poor activation characteristics limit their potential use. Many researchers have taken up the issue of enhancing the properties of BCC alloys as hydrogen storage materials by suitably substituting metal elements [11][12][13][14][15][16]. The present authors reported the hydrogen storage characteristics of metal substituted Ti-Zr-Cr-V-Cu alloy [17].…”

Section: Introductionmentioning

confidence: 89%

Effect of misch-metal substitution on structure and hydrogen desorption characteristics of Ti0.16Zr0.05Cr0.22V0.57 alloy

et al. 2011

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Misch-metal (Mm) substituted (Ti 0.16 Zr 0.05 Cr 0.22 V 0.57 ) 1-x Mm x (x = 0.0, 0.03, 0.05, 0.10) alloys were synthesized by arc-melting. Phase analysis and microstructural studies were carried out using powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques. The proportion of phases was estimated by Reitveld analysis of the powder X-ray diffraction data. The addition of Mm results in a decrease in the hydrogen storage capacity as well as a change in structure. The DTA analysis shows two endothermic peaks from ZrCr 2 H 4 and BCC hydride.

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“…The BCC phase enhances hydrogen capacity [11,22,29]; increases in the unit cell volume implies the availability of more hydrogen absorption sites or spaces, leading to an increase in storage capacity. The Laves phase is detrimental to storage capacity [10,[30][31][32], and alloys with larger Laves unit cell volumes or high Laves proportions are known to exhibit lower hydrogen capacity. Therefore, the observed increase in useful capacity after heat treatment was due to the increase in BCC unit cell volume.…”

Section: Methodsmentioning

confidence: 99%

Hydrogen Storage Characteristics and Corrosion Behavior of V-rich Ti-V-Cr-Fe Alloy

Abdul¹,

Chown²,

Odusote³

et al. 2017

Preprint

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Abstract:In this work, we investigated the effects of heat treatment on the microstructure, hydrogen storage characteristics and corrosion rate of a Ti34V40Cr24Fe2 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. Absorption/desorption 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 mixture of body-center-cubic (BCC) and Laves phase structures. 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 as-cast sample to 0.0009 mm/y after annealing and 0.0017 mm/y after quenching, due to a decrease in the Cr-content of the C14 phase.

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Effects of desorption temperature and substitution of Fe for Cr on the hydrogen storage properties of Ti0.32Cr0.43V0.25Ti0.32Cr0.43V0.25 alloy

Cited by 56 publications

References 17 publications

Hydrogen absorption/desorption properties in the TiCrV based alloys

Hydrogen absorption/desorption properties in the TiCrV based alloys

Effect of misch-metal substitution on structure and hydrogen desorption characteristics of Ti0.16Zr0.05Cr0.22V0.57 alloy

Hydrogen Storage Characteristics and Corrosion Behavior of V-rich Ti-V-Cr-Fe Alloy

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