Modeling of vial and ball motions for an effective mechanical milling process

Budin, Salina; Almanar, Indra Putra; Kamaruddin, Shahrul; Maideen, Normariah Che; Zulkifli, Abdul Halim

doi:10.1016/j.jmatprotec.2008.11.016

Cited by 17 publications

(11 citation statements)

References 17 publications

(22 reference statements)

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“…Regarding the Spex Mixer/Mill 8000, the dynamics of milling balls has been studied within a deterministic framework. [2][3][4][5] Numerical simulation results strongly support the experimental findings indicating that balls trajectories and collisions at the reactor walls are sensitive to the collision elasticity degree. 2,6,7 For instance, the elasticity of collisions governs the transition from chaotic to periodic behaviors, thus allowing for the promotion of ordered patterns in the ball trajectories.…”

Section: Introductionsupporting

confidence: 63%

“…Here, a numerical approach allows to control the huge number of collisions and point at relating the mechanical energy dissipated with the evolution of structural changes in the reacting substrate. Reliable models of the milling bodies dynamics inside the reactor [2][3][4][5] have been developed within a deterministic framework. Numerical simulations well describe experimental observations, 2,6,7 showing how transitions from periodic to chaotic regimes dominate the ball trajectory inside a mechanochemical device, depending upon the experimental constraints.…”

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confidence: 99%

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Multifractal properties of ball milling dynamics

Budroni

Pilosu

Delogu

et al. 2014

Chaos: An Interdisciplinary Journal of Nonlinear Science

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This work focuses on the dynamics of a ball inside the reactor of a ball mill. We show that the distribution of collisions at the reactor walls exhibits multifractal properties in a wide region of the parameter space defining the geometrical characteristics of the reactor and the collision elasticity. This feature points to the presence of restricted self-organized zones of the reactor walls where the ball preferentially collides and the mechanical energy is mainly dissipated.

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Section: Introductionsupporting

confidence: 63%

mentioning

confidence: 99%

Multifractal properties of ball milling dynamics

Budroni

Pilosu

Delogu

et al. 2014

Chaos: An Interdisciplinary Journal of Nonlinear Science

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“…At present, the methods of preparing high-entropy alloy powders are mainly gas atomization (GA) and mechanical alloying (MA), and there are also some elemental mixed (EM) methods [ 12 , 13 , 14 ]. Different preparation methods have different effects on the shape, particle size and composition uniformity of the HEA powders.…”

Section: Introductionmentioning

confidence: 99%

Effect of Binding and Dispersion Behavior of High-Entropy Alloy (HEA) Powders on the Microstructure and Mechanical Properties in a Novel HEA/Diamond Composite

Zhang

Liu

et al. 2018

Entropy

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This study reports the results of the addition of diamonds in the sintering process of a FCC-structured CoCrFeNiMo high-entropy alloy. The effect of raw powder states such as elemental mixed (EM) powder, gas atomization (GA) powder and mechanical alloying (MA) powder on the uniformity of constituent phase was also investigated. Examination of microstructure and evaluation of mechanical properties of the composites depending on the mixing processes were performed. As a result, GA+MA powder composite showed the highest mechanical properties. The experimental results indicated that the powder manufacturing method was an essential parameter to determine the quality of HEA/diamond composites such as the uniformity of phase and binding behavior.

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“…Tailoring ball milling conditions prior to hydrogenation and dehydrogenation processes is a proven method of improving reaction kinetics [7,9,11]. For synthesis and modification of nano-sized structures, high-energy ball milling is a well-established method [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Influence of milling parameters on the sorption properties of the LiH–MgB2 system doped with TiCl3

Busch

Jepsen

Pistidda

et al. 2015

Journal of Alloys and Compounds

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a b s t r a c tHydrogen sorption properties of the LiH-MgB 2 system doped with TiCl 3 were investigated with respect to milling conditions (milling times, ball to powder (BTP) ratios, rotation velocities and degrees of filling) to form the reactive hydride composite (RHC) LiBH 4 -MgH 2 . A heuristic model was applied to approximate the energy transfer from the mill to the powders. These results were linked to experimentally obtained quantities such as crystallite size, specific surface area (SSA) and homogeneity of the samples, using X-ray diffraction (XRD), the Brunauer-Emmett-Teller (BET) method and scanning electron microscopy (SEM), respectively. The results show that at approximately 20 kJ g À1 there are no further benefits to the system with an increase in energy transfer. This optimum energy transfer value indicates that a plateau was reached for MgB 2 crystallite size therefore the there was also no improvement of reaction kinetics due to no change in crystallite size. Therefore, this study shows that an optimum energy transfer value was reached for the LiH-MgB 2 system doped with TiCl 3 .

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Modeling of vial and ball motions for an effective mechanical milling process

Cited by 17 publications

References 17 publications

Multifractal properties of ball milling dynamics

Multifractal properties of ball milling dynamics

Effect of Binding and Dispersion Behavior of High-Entropy Alloy (HEA) Powders on the Microstructure and Mechanical Properties in a Novel HEA/Diamond Composite

Influence of milling parameters on the sorption properties of the LiH–MgB2 system doped with TiCl3

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