Threshold pressure for infiltration and particle specific surface area of particle compacts with bimodal size distributions

Molina, J.M.; Arpón, R.; Saravanan, R.; García‐Cordovilla, C.; Louis, E.; Narciso, J.

doi:10.1016/j.scriptamat.2004.05.009

Cited by 25 publications

(6 citation statements)

References 10 publications

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“…P 0 (threshold pressure for infiltration) is given by [11]: where lv the liquid-vapor surface tension and the contact angle at the liquid/solid interface. Note that in a wetting solid/fluid system ( 908) the threshold pressure is always negative.…”

Section: Resultsmentioning

confidence: 99%

“…where is the viscosity of polyethylene glycol and (P À P 0 ) the pressure drop in the liquid (which is equal to -P 0 as no external pressure is applied). P 0 (threshold pressure for infiltration) is given by [11]: where lv the liquid-vapor surface tension and the contact angle at the liquid/solid interface. Note that in a wetting solid/fluid system ( 908) the threshold pressure is always negative.…”

Section: Resultsmentioning

confidence: 99%

“…In the case of bimodal preforms, it has been proposed to derive S p for bimodal preforms from the linear mixture rule [11]:…”

Section: Particle Cleaning Mixing and Packingmentioning

confidence: 99%

See 2 more Smart Citations

The Intrinsic Permeability of Packed SiC Particles with Monomodal and Bimodal Size Distributions

Piñero

Molina

Narciso

et al. 2008

Journal of Composite Materials

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The intrinsic permeability k of preforms of packed -SiC particles having monomodal and bimodal particle size distributions has been evaluated by pressureless infiltration of a wetting organic fluid at room temperature. The study was carried out using SiC particles of average diameters in the range 4.88-168 mm and bimodal mixtures of particles with diameters of 16.9 and 168 mm. The experimental results for monomodal preforms can be fitted by Hazen's law, k / D(10) m , D(10) being the particle size for which 10% of particles are finer, with an exponent m ¼ 1.76 not far from that proposed by Hazen (m ¼ 2). Data for bimodal mixtures cannot be, however, described by Hazen's law due to the large changes in volume fraction that are promoted by varying the relative amount of the two particles. Instead, data for both monomodal and bimodal preforms can be satisfactorily fitted by Kozeny-Carman equation that incorporates particle volume fraction as one of the parameters.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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The Intrinsic Permeability of Packed SiC Particles with Monomodal and Bimodal Size Distributions

Piñero

Molina

Narciso

et al. 2008

Journal of Composite Materials

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“…This is in line with the drainage curves measured in this work that show a slow increase of saturation with applied pressure. Note that in standard graphite or SiC particles saturation is reached for applied pressures lower than twice the threshold pressure [14][15][16][17][18][19][20][21][22][23]. The effects of a third alloying element was also investigated, concluding that Mg and Ti additions are those that produce the M A N U S C R I P T…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Effects of infiltration pressure on mechanical properties of Al–12Si/graphite composites for piston engines

Narciso

Molina

Rodriguez

et al. 2016

Composites Part B: Engineering

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In this work results for the flexural strength and the thermal properties of interpenetrated graphite preforms infiltrated with Al-12wt%Si are discussed and compared to those for packed graphite particles. To make this comparison relevant, graphite particles of four sizes in the range 15-124 µm, were obtained by grinding the graphite preform. Effects of the pressure applied to infiltrate the liquid alloy on composite properties were investigated. In spite of the largely different reinforcement volume fractions (90% in volume in the preform and around 50% in particle compacts) most properties are similar. Only the Coefficient of Thermal Expansion is 50% smaller in the preform composites. Thermal conductivity of the preform composites (slightly below 100 W/m.K), may be increased by reducing the graphite content, alloying, or increasing the infiltration pressure. The strength of particle composites follows Griffith criterion if the defect size is identified with the particle diameter. On the other hand, the composites strength remains increasing up to unusually high values of the infiltration pressure. This is consistent with the drainage curves measured in this work. Mg and Ti additions are those that produce the most significant improvements in performance. Although extensive development work remains to be done, it may be concluded that both mechanical and thermal properties make these materials suitable for the fabrication of piston engines.

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“…Taking into account these data, we obtain that the threshold pressure is 0.18, 0.11 and 0.07 MPa for the different NaCl particle sizes. As the applied infiltration pressure is 1 MPa, the infiltration takes place, also as we know that if we apply 3 times the threshold pressure more than 99% of the interparticular space is infiltrated, and we would have a perfect continuous system, and it has been demonstrated for others metals [ 37 , 40 , 43 ].…”

Section: Resultsmentioning

confidence: 99%

New Generation of MOF-Monoliths Based on Metal Foams

et al. 2022

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Herein, it has been developed a method to prepare metallic foams starting from Zamak5 (ZnAlCu alloy) with different pore sizes. The Zamak5 metallic foam is designed to serve as a support and metallic precursor of ZIF-8. In this way, composite materials MOF-metal can be prepared, these composites have a large number of application in energy exchange processe such as: adsorption or chemical reactions. Additionally, this method of sythesizing MOFs is environmentally friendly thanks to absence of solvents. Hanerssing the low melting point of the linker, the linker is infiltrated into the foam where the foam and the linker react to form the ZIF-8. In this way we have managed to transform part of the foam into ZIF-8 crystals that remain adhered to the foam. The foams have been characterized and modeled studying the mechanical and electrical properties, finding that both can be predected by various models. Among these, Ashby and Mortensen models for mechanical properties and Ashby and Percolation model for electrical properties stand.

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Threshold pressure for infiltration and particle specific surface area of particle compacts with bimodal size distributions

Cited by 25 publications

References 10 publications

The Intrinsic Permeability of Packed SiC Particles with Monomodal and Bimodal Size Distributions

The Intrinsic Permeability of Packed SiC Particles with Monomodal and Bimodal Size Distributions

Effects of infiltration pressure on mechanical properties of Al–12Si/graphite composites for piston engines

New Generation of MOF-Monoliths Based on Metal Foams

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