Effect of processing parameters on the properties of freeze-cast Ni wick with gradient porosity

Lloreda-Jurado, P.J.; Chicardi, E.; Paúl, A.; Sepúlveda, R.

doi:10.1016/j.matdes.2021.109795

Cited by 7 publications

(7 citation statements)

References 58 publications

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“…The presence of small pore size and high pore interconnectivity promoted by the higher FR applied are responsible for this behavior. Similar results were reported elsewhere [17]. Wicks labeled as S/40/800 and S/10/800 showed the lowest water mass absorbed fraction and rate, attributing to the low P O reached leading to minor open porosity since they exhibited similar pore sizes compared with L/10/800 and M/10/800 Ni wick.…”

Section: Capillary Performance (Cp) Of the Ni Wickssupporting

confidence: 88%

“…Traditionally, wicks have been manufactured by cold pressing using space holders [14] or loose sintering technologies [15,16]. As an alternative, the freeze-casting technique deserves special mention due to its numerous advantages, including the possibility of acquiring complex geometries, low cost-effectiveness ratio, eco-friendly, and scalability [8,17]. This technique is based on the direct solidification of a particle suspension, where the solvent crystals push and compact the dispersed particles towards the free spaces of their contour.…”

Section: Introductionmentioning

confidence: 99%

“…Morphology features and pore size can be altered by: (1) using different solvents-water for lamellar pores or camphene for dendritic crystallization-and (2) the control of thermo-kinetic parameters, such as the solidification rate or thermal gradient [18,19]. In a previous work [17], nickel wicks were manufactured by freeze-casting using NiO nanoparticles of 40 nm in diameter. However, the use of the freeze-casting technique to develop porous metal materials (such as the abovementioned wicks) presents some problems.…”

Section: Introductionmentioning

confidence: 99%

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Nickel Wick by Continuous Freeze-Casting: Influences of the Particle Size on the Capillarity and Mechanical Properties

et al. 2021

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The aim of this work was to study the effect of the particle size range, the freeze casting temperature and sintering temperature on the capillarity performance and mechanical properties of Ni wicks manufactured by freeze-casting. The use of Ni/camphene-polystyrene suspensions creates wicks with an open porosity above 80% and average pore sizes of 38 μm to 17 μm by tailoring the particle size ranges and freezing temperatures employed. The incorporation of PS and the use of a continuous freeze-casting process reduces the particle sedimentation and generates a highly interconnected pore structure with regular pore sizes across the sample. The capillarity performances exhibit a fast and complete water adsorption, especially in Ni wicks freeze-casted at 10 °C and sintered at 800 °C, but only when the smaller particle size range is used do Ni wicks achieve sufficient mechanical strength.

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Section: Capillary Performance (Cp) Of the Ni Wickssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nickel Wick by Continuous Freeze-Casting: Influences of the Particle Size on the Capillarity and Mechanical Properties

et al. 2021

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“…The maximum infiltration percentage of the total interconnected porosity was therefore reached for Ti30 (88 vol.% of hydrogel 3 infiltration) after 120 min, while for the Ti60 foams, a higher value of 90.1 vol.% was reached after 75 min. In making use of the hydrogel properties determined, it was possible to simulate the theoretical curves for both infiltration processes according to the Lucas-Washburn equation [ 58 ]. These curves are also shown in hollow symbols in Figure 7 a.…”

Section: Resultsmentioning

confidence: 99%

Type-A Gelatin-Based Hydrogel Infiltration and Degradation in Titanium Foams as a Potential Method for Localised Drug Delivery

et al. 2023

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A gelatin-based hydrogel was infiltrated and degraded-released in two different titanium foams with porosities of 30 and 60 vol.% (Ti30 and Ti60 foams) and fabricated by the space holder technique to evaluate its potential to act as an innovative, alternative, and localised method to introduce both active pharmaceutical ingredients, such as antibiotics and non-steroidal anti-inflammatory drugs, and growth factors, such as morphogens, required after bone-tissue replacement surgeries. In addition, the kinetic behaviour was studied for both infiltration and degradation-release processes. A higher infiltration rate was observed in the Ti60 foam. The maximum infiltration hydrogel was achieved for the Ti30 and Ti60 foams after 120 min and 75 min, respectively. Further, both processes followed a Lucas-Washburn theoretical behaviour, typical for the infiltration of a fluid by capillarity in porous channels. Regarding the subsequent degradation-release process, both systems showed similar exponential degradation performance, with the full release from Ti60 foam (80 min), versus 45 min for Ti30, due to the greater interconnected porosity open to the surface of the Ti60 foam in comparison with the Ti30 foam. In addition, the optimal biocompatibility of the hydrogel was confirmed, with the total absence of cytotoxicity and the promotion of cell growth in the fibroblast cells evaluated.

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“…Freeze casting is a new type of porous ceramic preparation process that is simple to operate, low cost, and environment‐friendly 29,30 . This process combines the techniques of slurry freezing, low‐pressure sublimation, and sinter densification 31–33 .…”

Section: Introductionmentioning

confidence: 99%

Rheological, mechanical, and electrical properties of Sr_0.7Bi_0.2TiO₃ modified BaTiO₃ ceramic and its composites

et al. 2023

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Porous BaTiO3‐based relaxor ferroelectric ceramics with lamellar structure were achieved by ice templating method, and the rheological properties of ceramic slurry for freeze casting were deeply studied. Epoxy resin was then backfilled to generate ceramic–epoxy resin composites. Ceramic–epoxy composites with a lamellar structure were obtained when using a slurry with a ceramic content of 45 wt.%. The nanoindentation results showed that the introduction of ceramic materials into the epoxy resin can significantly improve the penetration resistance and hardness of the material. The dielectric and ferroelectric properties of the composites were also characterized. The interaction between the highly coupled dipoles in the polymers results in a decrease in the breakdown field strength of the composite. The dielectric constant reached up to ∼800. At 220 kV/cm, Wrec = 0.62 J/cm3, and η was ∼80%. At low frequencies, Wrec was ∼0.16 J/cm3, which indicated good stability.

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Effect of processing parameters on the properties of freeze-cast Ni wick with gradient porosity

Cited by 7 publications

References 58 publications

Nickel Wick by Continuous Freeze-Casting: Influences of the Particle Size on the Capillarity and Mechanical Properties

Nickel Wick by Continuous Freeze-Casting: Influences of the Particle Size on the Capillarity and Mechanical Properties

Type-A Gelatin-Based Hydrogel Infiltration and Degradation in Titanium Foams as a Potential Method for Localised Drug Delivery

Rheological, mechanical, and electrical properties of Sr_0.7Bi_0.2TiO₃ modified BaTiO₃ ceramic and its composites

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Effect of processing parameters on the properties of freeze-cast Ni wick with gradient porosity

Cited by 7 publications

References 58 publications

Nickel Wick by Continuous Freeze-Casting: Influences of the Particle Size on the Capillarity and Mechanical Properties

Nickel Wick by Continuous Freeze-Casting: Influences of the Particle Size on the Capillarity and Mechanical Properties

Type-A Gelatin-Based Hydrogel Infiltration and Degradation in Titanium Foams as a Potential Method for Localised Drug Delivery

Rheological, mechanical, and electrical properties of Sr0.7Bi0.2TiO3 modified BaTiO3 ceramic and its composites

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Product

Resources

About

Rheological, mechanical, and electrical properties of Sr_0.7Bi_0.2TiO₃ modified BaTiO₃ ceramic and its composites