TY - JOUR
T1 - Synthesis of Nanostructured TiFe Hydrogen Storage Material by Mechanical Alloying via High-Pressure Torsion
AU - Gómez, Edgar Ignacio López
AU - Edalati, Kaveh
AU - Antiqueira, Flávio José
AU - Coimbrão, Diego Davi
AU - Zepon, Guilherme
AU - Leiva, Daniel Rodrigo
AU - Ishikawa, Tomaz Toshimi
AU - Cubero-Sesin, Jorge M.
AU - Botta, Walter José
N1 - Funding Information:
The author E.I.L.G. acknowledges the scholarship from the Doctorate in Engineering Program and the Graduate Directorate of ITCR, Costa Rica. This work is supported in part by grants-in-aid for scientific research from the MEXT, Japan (No. 16H04539 and 19H05176), in part by the Brazilian agencies FAPESP (No. 2019-09816-0), CNPq, and CAPES, and in part by ITCR, Costa Rica (No. VIE-CF1490018). The authors thank the Laboratory of Structural Characterization (LCE/DEMa/UFSCar), Brazil for electron microscopy.
Funding Information:
The author E.I.L.G. acknowledges the scholarship from the Doctorate in Engineering Program and the Graduate Directorate of ITCR, Costa Rica. This work is supported in part by grants‐in‐aid for scientific research from the MEXT, Japan (No. 16H04539 and 19H05176), in part by the Brazilian agencies FAPESP (No. 2019‐09816‐0), CNPq, and CAPES, and in part by ITCR, Costa Rica (No. VIE‐CF1490018). The authors thank the Laboratory of Structural Characterization (LCE/DEMa/UFSCar), Brazil for electron microscopy.
Publisher Copyright:
© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/10/1
Y1 - 2020/10/1
N2 - 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.
AB - 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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U2 - 10.1002/adem.202000011
DO - 10.1002/adem.202000011
M3 - Article
AN - SCOPUS:85085688254
SN - 1438-1656
VL - 22
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
IS - 10
M1 - 2000011
ER -