Analysis of Packing Density by Randomly Packed Models of Binary Powders

Itoh, Takashi; Wanibe, Yoshimoto; Sakao, Hiroshi

doi:10.2320/jinstmet1952.50.5_475

Cited by 8 publications

(4 citation statements)

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“…The experience showed that if compressive stress P and shear stress τ are applied simultaneously, the preform is stayed sufficient strength for further relocating. That can be associated with pores closing and enhancement of the adhesion bonds and redistribution of local stresses [53][54][55][56][57]. With an increase in the load, microcracks arise near the boundaries due to the large accumulation of dislocations, resulting in brittle fracture [58][59][60][61].…”

Section: Developed Methods Of Complex Loadmentioning

confidence: 99%

A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts

et al. 2019

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Highly performance methods for cold pressing (cold die forging) of preforms from iron powder with subsequent heat treatment and producing ready parts made of powder are described in the paper. These methods allow fabricating parts with smooth surfaces and improved mechanical characteristics—porosity, tensile strength. Application of the traditional design set-up with a single-axial loading is restricted to high stresses in the dies to deform the preforms that lead to cracks formation. New powder compaction schemes by applying active friction forces (shear-enhanced compaction) make it possible to unload dies and produce high-quality parts by cold pressing. The scheme allows moving the die in the direction of the material flow with a velocity that exceeds the material flow velocity.

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Section: Developed Methods Of Complex Loadmentioning

confidence: 99%

A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts

et al. 2019

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“…However, the results in Table 8 show that the effect of the shape difference on the packing densities of these adsorbent pellets were negligibly small. There are many reports on investigations of the packing densities of solid particles having size differences based various measurement methods or DEM packing simulations [30][31][32]. The size difference of the particles and its distribution generally cause some increase in the packing density owing to the effect of increased volumetric occupancy by smaller particles.…”

Section: Co 2 -Psa Pilot Testsmentioning

confidence: 99%

Reduction of Electric Power Consumption in CO2-PSA with Zeolite 13X Adsorbent

Shigaki¹,

Mogi²,

Haraoka³

et al. 2018

Energies

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Reduction of CO 2 from waste gases from various industries is now desired worldwide. As a technology for separating CO 2 from mixed gases, Pressure Swing Adsorption (PSA) is one of the practical processes that are widely used at present owing to the simplicity of its gas separation mechanism. In order to reduce the cost of CO 2 separation, a further reduction of the running cost of CO 2-PSA operation is required. Among all the utilities used in CO 2-PSA, electric power consumption has the greatest impact, especially in cases where the pressure swing range between gas adsorption and gas desorption is large. Electric power consumption increases significantly when the pressure loss inside the adsorber has reached a non-negligible level. Changing the adsorbent pellet size is a convenient method for reducing pressure loss, but its effect on CO 2-PSA performance was unclear. Therefore, in this work, the effects of the size of the adsorbent pellets on both the gas adsorption behavior and the electric power consumption in CO 2-PSA were evaluated experimentally. From the results of laboratory-scale CO 2-PSA experiments and gas adsorption rate measurements, it was observed that the effect of the pellet size appeared only in the early stage of the gas adsorption step and was not dominant when the cycle time was sufficiently long. Subsequently, pilot-scale CO 2-PSA experiments with the same CO 2 throughput were also conducted, and as a result, the electric power consumption of a vacuum pump was lowered by 15% in case of using d = 3.0 mm larger adsorbent pellets compared to the results with d = 1.5 mm smaller adsorbent pellets.

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“…Note that particles with a bimodal distribution show a higher volume fraction than monodisperse particles, since smaller particles fill the gaps between larger particles. 13,14) Further improvement in V f is expected from using amorphous FeB submicrometer particles with a large size difference. In this study, polymer composites were fabricated using amorphous FeB submicrometer particles (AFBS) and fine amorphous FeB particles (FAFB).…”

Section: Introductionmentioning

confidence: 99%

Microwave Absorption Properties of Highly Filled Polymer Composites with Amorphous Fe–B Particles

et al. 2012

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In this study, polymer composites containing amorphous FeB particles with large particle size distribution were fabricated. A polymer composite of mixed particles showed a high relative permeability of ® 0 r = 9.3 at 1 GHz. In addition, the composite exhibited good microwave absorption properties (R.L. < ¹20 dB) in the frequency range of 0.61.1 GHz for absorber thickness of 2.44.2 mm. Thus, this polymer composite can be used for fabricating microwave absorbers that are effect in the 0.71.0 GHz band, and would result in microwave absorbers thinner than any other microwave absorbers reported to date.

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Analysis of Packing Density by Randomly Packed Models of Binary Powders

Cited by 8 publications

References 0 publications

A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts

A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts

Reduction of Electric Power Consumption in CO2-PSA with Zeolite 13X Adsorbent

Microwave Absorption Properties of Highly Filled Polymer Composites with Amorphous Fe–B Particles

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Analysis of Packing Density by Randomly Packed Models of Binary Powders

Cited by 8 publications

References 0 publications

A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts

A Cold-Pressing Method Combining Axial and Shear Flow of Powder Compaction to Produce High-Density Iron Parts

Reduction of Electric Power Consumption in CO2-PSA with Zeolite 13X Adsorbent

Microwave Absorption Properties of Highly Filled Polymer Composites with Amorphous Fe&ndash;B Particles

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Product

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About

Microwave Absorption Properties of Highly Filled Polymer Composites with Amorphous Fe–B Particles