scholarly journals Effect of Mechanical Activation on the In Situ Formation of TiB2 Particulates in the Powder Mixture of TiH2 and FeB

2017 ◽  
Vol 62 (2) ◽  
pp. 1393-1398 ◽  
Author(s):  
X.-K. Huynh ◽  
B.-W. Kim ◽  
J.S. Kim
Keyword(s):  
Mechanical Activation ◽  
Ball Milling ◽  
Powder Mixture ◽  
Electrical Power ◽  
Interface Reaction ◽  
High Energy ◽  
Decomposition Temperature ◽  
Homogeneous Microstructure ◽  
In Situ Formation

AbstractThe in situ formation of TiB2particulates via an interface reaction between Ti and FeB powders was studied. The effects of mechanical activation by high-energy milling on the decomposition of TiH2and the interface reactions between Ti and FeB powders to form TiB2were investigated. Powder mixtures were fabricated using planetary ball-milling under various milling conditions. The specific ball-milling energy was calculated from the measured electrical power consumption during milling process. High specific milling energy (152.6 kJ/g) resulted in a size reduction and homogeneous dispersion of constituent powders. This resulted in a decrease in the decomposition temperature of TiH2and an increase in the formation reaction of TiB2particulates in the Fe matrix, resulting in a homogeneous microstructure of nanoscale TiB2evenly distributed within the Fe matrix. In contrast, the powder mixture milled with low specific milling energy (36.5 kJ/g) showed an inhomogeneous microstructure composed of relatively large Fe-Fe2B particles surrounded by a thin layer of Fe-TiB2within a finely dispersed Fe-TiB2matrix region.

scholarly journals Mechanochemistry of Metal Hydrides: Recent Advances

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2778 ◽  
Author(s):  
Jacques Huot ◽  
Fermín Cuevas ◽  
Stefano Deledda ◽  
Kaveh Edalati ◽  
Yaroslav Filinchuk ◽  
...  
Keyword(s):  
Ball Milling ◽  
High Pressure Torsion ◽  
International Workshop ◽  
Metal Hydrides ◽  
High Energy ◽  
Surface Mechanical Attrition Treatment ◽  
X Ray Diffraction ◽  
Mechanical Attrition ◽  
Recent Developments

This paper is a collection of selected contributions of the 1st International Workshop on Mechanochemistry of Metal Hydrides that was held in Oslo in May 2018. In this paper, the recent developments in the use of mechanochemistry to synthesize and modify metal hydrides are reviewed. A special emphasis is made on new techniques beside the traditional way of ball milling. High energy milling, ball milling under hydrogen reactive gas, cryomilling and severe plastic deformation techniques such as High-Pressure Torsion (HPT), Surface Mechanical Attrition Treatment (SMAT) and cold rolling are discussed. The new characterization method of in-situ X-ray diffraction during milling is described.

Influence of the high energy ball milling on structure and reactivity of the Ni+Al powder mixture

2013 ◽  
Vol 577 ◽  
pp. 600-605 ◽  
Author(s):  
A.S. Rogachev ◽  
N.F. Shkodich ◽  
S.G. Vadchenko ◽  
F. Baras ◽  
D.Yu. Kovalev ◽  
...  
Keyword(s):  
Ball Milling ◽  
Powder Mixture ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Energy Ball ◽  
Al Powder

In-situ Formation of Co3O4 Nanocrystals Embedded in Laser-Induced Graphene Foam for High-Energy Flexible Micro-supercapacitor

2022 ◽  
Author(s):  
Xiaohong Ding ◽  
Ruilai Liu ◽  
Jiapeng Hu ◽  
Jingyun Zhao ◽  
Jinjin Wu ◽  
...  
Keyword(s):  
Cost Effective ◽  
High Energy ◽  
Wearable Electronics ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Effective Synthesis ◽  
In Situ Formation ◽  
The Cost ◽  
Power Densities

The cost-effective synthesis of flexible energy storage devices with high energy and power densities is a challenge in wearable electronics. Here, we report a facile, efficient, and scalable approach for...

High energy ball-milled Ti2RuFe electrocatalyst for hydrogen evolution in the chlorate industry

1997 ◽  
Vol 12 (6) ◽  
pp. 1492-1500 ◽  
Author(s):  
Marco Blouin ◽  
Daniel Guay ◽  
Jacques Huot ◽  
Robert Schulz
Keyword(s):  
Crystallite Size ◽  
Ball Milling ◽  
Powder Mixture ◽  
Structural Evolution ◽  
High Energy ◽  
Atomic Ratio ◽  
Iron Electrode ◽  
Energy Ball ◽  
Disk Electrodes ◽  
Almost All

The high energy mechanical alloying of a Ti–Ru–Fe powder mixture (atomic ratio 2 : 1: 1) has been performed by extensive ball-milling in a steel crucible. The structural evolution of the resulting materials has been studied by x-ray powder diffraction analysis. The identification of the various phases present in the materials, as well as the crystallite size and strain, has been performed by Rietveld refinement analysis. In the first stage of the material transformation, Ru or Fe atoms dissolved into Ti to yield to the formation of β–Ti. Upon further ball-milling, almost all the original constituents of the powder mixture have disappeared and a new simple cubic Ti2RuFe phase is formed, with a crystallite size as small as 8 nm. The electrochemical properties of these materials have been tested in a typical chlorate electrolyte by cold-pressing the powders into disk electrodes. At 20 h of ball-milling, where the phase concentration of Ti2RuFe reaches 96%, a reduction of the activation overpotential at 250 mA cm−2 of nearly 250 mV is observed when compared to that of a pure iron electrode.

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