reactive ball milling

Nanomaterials | Free Full-Text | Mechanical …

Despite the use of conventional methods for preparing metal nitrides and hydrides, the reactive ball-milling (RBM) technique, which was first proposed by Calka et al. and El-Eskandarany et al., has been …

Advancing mechanochemical synthesis by combining milling …

A contact-electro-catalysis process for producing reactive oxygen species by ball milling of triboelectric materials Article Open access 26 January 2024. Introduction. Mechanochemistry — that ...

Mechanical alloying and reactive milling in a high energy …

Selected snapshots showing ball positions inside a milling vial are shown in Fig. 2 for different numbers of milling balls. In addition, the ball velocities are illustrated (with the vial as the reference frame). In all cases, as is apparent from the top portion of Fig. 2, nearly all balls are in contact with the inner vial surface.

Increase in the dehydrogenation rates and hydrogen-storage …

Reactive ball milling was conducted in a planetary ball mill (Planetary Mono Mill; Pulverisette 6, Fritsch, Germany) filled with high purity hydrogen (≈ 12 bar). The disc revolution speed was 400 rpm. The milling was done for 12 h, refilling the hydrogen every two hours. To prepare Mg-2.5Ni-2.5graphene, graphene (0.2 g) was added to the pre ...

Reactive Ball Milling to Fabricate Nanocrystalline Titanium Nitride

The room-temperature reactive ball milling (RBM) approach was employed to synthesize nanostructured fcc-titanium nitride (TiN) powders, starting from milling hcp-titanium (Ti) powders under 10 bar of a nitrogen gas atmosphere, using a roller mill. During the first and intermediate stage of milling, the agglomerated Ti powders were …

Nanostructures from Reactive High-Energy Ball Milling

The chapter summarizes some of the more recent developments in the application of reactive high-energy ball milling (RHEBM) to the formation of unique …

Hydrogen storage properties of a Mg-La-Fe-H nano …

In the present work, a Mg-La-Fe-H nano-composite was prepared through reactive ball milling of the mixture of MgH 2, Fe and La powders.The phase components, microstructure and hydrogen sorption properties of the composite powders were carefully investigated. After milling, an unsaturated hydride LaH 2.3 formed in the Mg-La-Fe-H …

A contact-electro-catalysis process for producing reactive …

Ball milling is a representative mechanochemical strategy that uses the mechanical agitation-induced effects, defects, or extreme conditions to activate substrates. Here, we demonstrate that ball grinding could bring about contact-electro-catalysis (CEC) by using inert and conventional triboelectric materials. Exemplified by a liquid-assisted …

Kinetics and thermodynamics of hydrogenation

Reactive ball milling (RBM) experiments under hydrogen gas (typically 8 MPa) have been carried out in a high-pressure milling vial commercialized by Evico-magnetics equipped with gas pressure and temperature sensors [5], [39]. The milling was performed in a Fritsch Pulverisette P4 planetary mill at disk and vial rotation speed of …

The Significant Thermodynamic Destabilization and Superior …

Nanocrystalline MgH2 powders were prepared by reactive ball milling of pure Mg powders under 50 bar of a hydrogen gas atmosphere, using a high energy ball mill operated at room temperature. The ...

Ball Milling of La2O3 Tailors the Crystal Structure, Reactive …

Ball Milling of La 2 O 3 Tailors the Crystal Structure, Reactive Oxygen Species, and Free Radical and Non-Free Radical Photocatalytic Pathways Xuewen Luo Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China …

Mechanochemical techniques for the activation and use of …

A contact-electro-catalysis process for producing reactive oxygen species by ball milling of triboelectric materials Article Open access 26 January 2024. Main. The formation of carbon–carbon ...

Synthesis of titanium nitride powders by reactive ball milling …

The reactive ball milling time can be reduced by increasing the rotation speed of the milling machine. The grain size of the titanium nitride powders was increased by prolonging the milling time. Based on thermodynamic theory, it is predicted that the metal nitrides with negative large formation enthalpy such as ZrN and HfN can be …

NaAlH4 production from waste aluminum by reactive ball milling

Bellosta von Colbe et al. [10] showed that it is possible to synthesize NaAlH 4 by means of reactive ball milling starting from commercial NaH and 325 mesh Al powder. In our work we followed this procedure but used Al obtained from recycled waste incineration slag instead of the fine Al powder. This approach decreases material costs …

Mesoporous ball-milling iron-loaded biochar for enhanced sorption …

Mesoporous ball-milling iron-loaded biochar for enhanced sorption of reactive red: ... Ball-milling significantly increased the specific surface area of biochar and created more mesopores, which would provide more active adsorption sites and facilitate the diffusion of RR120 molecules. This work provides a new insight for the modification …

Hydrogen storage properties of a Mg-La-Fe-H nano …

In the present work, a Mg-La-Fe-H nano-composite was prepared through reactive ball milling of the mixture of MgH 2, Fe and La powders. The phase components, microstructure and hydrogen sorption properties of the composite powders were carefully investigated. After milling, an unsaturated hydride LaH 2.3 formed in the

Reactive and Nonreactive Ball Milling of …

Using the same starting materials, we prepare the SnSb intermetallic compound by reactive ball milling using a high-energy …

Nanoscale characterization and formation mechanism of …

Reactive-inspired ball-milling is proposed as a new production route for oxide dispersion strengthened (ODS) steels. So a Fe–14Cr–2W–1Ti–0.8Y–0.2O (wt.%) ODS steel is elaborated by ball-milling of FeCrWTi and YFe 3 plus Fe 2 O 3 powders instead of Y 2 O 3 and then by annealing at 800 °C for 5 min. Characterizations by …

A contact-electro-catalysis process for producing …

Ball milling is a representative mechanochemical strategy that uses the mechanical agitation-induced effects, defects, or extreme conditions to acti-vate substrates. Here, …

Microstructure and ignition mechanisms of reactive …

Al:Zr composite powders are synthesized via arrested reactive ball milling (ARM) and contain small inclusions of Zr within an Al matrix. We characterize the microstructure and ignition temperatures of the powders as a function of size using the following size ranges: 0–10, 10–32, 32–53, 53–75, and > 75 µm. We observe uniformity …

Highly reactive hydrogen storage Mg2Ni alloy prepared by

The Mg 2 NiH 4 hydride was obtained from Mg (Alfa Cesar, 99.8% particle size 150 μm) and Ni (Aldrich, 99.7%, particle size 3 μm) powders by reactive high-energy ball milling (HEBM-RM) in a planetary mill (Fritsch/Pulverisatte 6) using a vial with internal volume of 160 ml under H 2 atmosphere.

High-entropy (HfTaTiNbZr)C and (HfTaTiNbMo)C carbides …

Powders of high-entropy Hf 0.2 Ta 0.2 Ti 0.2 Nb 0.2 Zr 0.2 C (HEC Zr) and Hf 0.2 Ta 0.2 Ti 0.2 Nb 0.2 Mo 0.2 C (HEC Mo) carbides were fabricated through the reactive high-energy ball milling (R-HEBM) of metal and graphite particles.It was found that 60 min of R-HEBM is adequate to achieve a full conversion of the initial precursors into a FCC …

Ball milling as a mechanochemical technology for …

Mechanochemical technique aims to strike a balance between defect formation via ball milling and size adjustment of a solid grain to nanoscale (<1000 nm) (Ullah et al., 2014).During the process, a high-energy mill is employed and a specific powder charge is placed along with a milling medium (Lin et al., 2017).The kinetic …

A contact-electro-catalysis process for producing …

Ball milling is a representative mechanochemical strategy that uses the mechanical agitation-induced effects, defects, or extreme conditions to acti- ... Producing reactive oxygen species (ROS ...

A contact-electro-catalysis process for producing reactive …

Through contact-electro-catalysis (CEC), reactive oxygen species can be produced by chemically inert triboelectric materials in ball milling, enabling …

Morphological and structural evolutions of nonequilibrium …

Nonequilibrium titanium-nitride alloy powders have been fabricated by a high energetic ball mill under nitrogen gas flow at room temperature and characterized by means of x-ray diffraction, scanning electron microscopy, transmission electron microscopy, and differential scanning calorimetry. Initial hcp titanium is completely transformed to …

Nano TiC-Graphene-Cu composites fabrication by a modified ball-milling …

A two-step mechanical milling followed by a reactive sintering process was used to synthesize Nano TiC-Graphene-Cu composites from a mixture of Cu, Ti, and Graphene (GN) powders in four different compositions, and effects of reinforcements content on the microstructure and mechanical properties were studied.

Reactive ball milling to produce nanocrystalline ZnO

Since ball milling is a violent technique involving damaging the material, we may expect that resulting oxides would have a nanocrystalline structure. In this letter, we …

Magnesium–carbon hydrogen storage hybrid materials …

High energy reactive ball milling in hydrogen atmosphere (HRBM) of Mg with catalytic additives has been proven to be the most efficient way to further improve the re …