Effects of substituting Al for Cr in the Ti0.32Cr0.43V0.25 alloy on its microstructure and hydrogen storage properties

Jeong Hyun Yoo; Gunchoo Shim; Jae Sik Yoon; Sung Wook Cho

doi:10.1016/j.ijhydene.2008.11.102

Effects of substituting Al for Cr in the Ti_0.32Cr_0.43V_0.25 alloy on its microstructure and hydrogen storage properties

Jeong Hyun Yoo
, Gunchoo Shim
, Jae Sik Yoon
, Sung Wook Cho^*

^*Corresponding author for this work

Geography Education

Korea Institute of Geoscience and Mineral Resources
Korea Basic Science Institute

Research output: Contribution to journal › Journal article › peer-review

34 Scopus citations

Abstract

Substituting Al for part of Cr in Ti_0.32Cr_0.43V_0.25 alloy caused BCC lattice parameter and crystallite size to increase and lattice strain to decrease. These microstructual changes caused the decrease in the hydrogen storage capacity and the increase in both the plateau pressure and the hysteresis. The results were contradictory to the general observation that the plateau pressure decreases with the increase in the lattice parameter. The fact that the bond structure between H and Al and that between H and the transition metals differ can account for this discrepancy. This difference also resulted in the decrease in the hydrogen storage capacity. The increased hysteresis resulting from the increase in the Al content can be ascribed to the increased crystallite size and the decreased lattice strain.

Original language	English
Pages (from-to)	1463-1467
Number of pages	5
Journal	International Journal of Hydrogen Energy
Volume	34
Issue number	3
DOIs	https://doi.org/10.1016/j.ijhydene.2008.11.102
State	Published - 2009.02

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

BCC
Crystallite size
Hydrogen storage alloy
Ti-Cr-V alloy
X-ray diffraction

Access to Document

10.1016/j.ijhydene.2008.11.102

Cite this

@article{f7393565e4e349328336b1c5c0d32cec,

title = "Effects of substituting Al for Cr in the Ti0.32Cr0.43V0.25 alloy on its microstructure and hydrogen storage properties",

abstract = "Substituting Al for part of Cr in Ti0.32Cr0.43V0.25 alloy caused BCC lattice parameter and crystallite size to increase and lattice strain to decrease. These microstructual changes caused the decrease in the hydrogen storage capacity and the increase in both the plateau pressure and the hysteresis. The results were contradictory to the general observation that the plateau pressure decreases with the increase in the lattice parameter. The fact that the bond structure between H and Al and that between H and the transition metals differ can account for this discrepancy. This difference also resulted in the decrease in the hydrogen storage capacity. The increased hysteresis resulting from the increase in the Al content can be ascribed to the increased crystallite size and the decreased lattice strain.",

keywords = "BCC, Crystallite size, Hydrogen storage alloy, Ti-Cr-V alloy, X-ray diffraction",

author = "Yoo, \{Jeong Hyun\} and Gunchoo Shim and Yoon, \{Jae Sik\} and Cho, \{Sung Wook\}",

year = "2009",

month = feb,

doi = "10.1016/j.ijhydene.2008.11.102",

language = "English",

volume = "34",

pages = "1463--1467",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

number = "3",

}

TY - JOUR

T1 - Effects of substituting Al for Cr in the Ti0.32Cr0.43V0.25 alloy on its microstructure and hydrogen storage properties

AU - Yoo, Jeong Hyun

AU - Shim, Gunchoo

AU - Yoon, Jae Sik

AU - Cho, Sung Wook

PY - 2009/2

Y1 - 2009/2

N2 - Substituting Al for part of Cr in Ti0.32Cr0.43V0.25 alloy caused BCC lattice parameter and crystallite size to increase and lattice strain to decrease. These microstructual changes caused the decrease in the hydrogen storage capacity and the increase in both the plateau pressure and the hysteresis. The results were contradictory to the general observation that the plateau pressure decreases with the increase in the lattice parameter. The fact that the bond structure between H and Al and that between H and the transition metals differ can account for this discrepancy. This difference also resulted in the decrease in the hydrogen storage capacity. The increased hysteresis resulting from the increase in the Al content can be ascribed to the increased crystallite size and the decreased lattice strain.

AB - Substituting Al for part of Cr in Ti0.32Cr0.43V0.25 alloy caused BCC lattice parameter and crystallite size to increase and lattice strain to decrease. These microstructual changes caused the decrease in the hydrogen storage capacity and the increase in both the plateau pressure and the hysteresis. The results were contradictory to the general observation that the plateau pressure decreases with the increase in the lattice parameter. The fact that the bond structure between H and Al and that between H and the transition metals differ can account for this discrepancy. This difference also resulted in the decrease in the hydrogen storage capacity. The increased hysteresis resulting from the increase in the Al content can be ascribed to the increased crystallite size and the decreased lattice strain.

KW - BCC

KW - Crystallite size

KW - Hydrogen storage alloy

KW - Ti-Cr-V alloy

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/59049084408

U2 - 10.1016/j.ijhydene.2008.11.102

DO - 10.1016/j.ijhydene.2008.11.102

M3 - Journal article

AN - SCOPUS:59049084408

SN - 0360-3199

VL - 34

SP - 1463

EP - 1467

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 3

ER -