Fabricating metal wicks by LMC-like continuous directional freeze casting

Lin, Tao; Gan, Tian; Quan, Xiaojun; Cheng, Ping

doi:10.1016/j.jmatprotec.2020.116641

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…The use of nickel oxide particles through the FC process in water-based suspensions is widespread since it obtains porous materials for the application of solid oxide fuel cells (SOFCs) [31,32], while the use of camphene-based suspensions to produce Ni wicks remains limited. Nonetheless, recent research successfully developed Ni wicks by FC using a water-based suspension of metal particles [33]. The employment of camphene offers a wide range of benefits, such as anisotropic branched morphology with gradual pore sizes, large and elongated pores in the direction of solidification, and high percentages of interconnected porosity.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…The lattice structure has great application potential in the orthopedics, acoustics, military and aerospace fields due to its lightweight, good sound insulation capability as well as high specific strength (Barbas et al , 2012; Lin et al , 2020). Freeze casting (Liu et al , 2017; Lin et al , 2020), polymeric sponge replication (Jamaludin et al , 2015; Wang et al , 2017) and powder sintering (Chen et al , 2014) are the conventional techniques to fabricating lattice structures. However, it is difficult to control the unit cell and strut size, which play a key role on the lattice structure performance (Ma et al , 2019).…”

Section: Introductionmentioning

confidence: 99%

Compressive response of selective laser-melted lattice structures with different strut sizes based on theoretical, numerical and experimental approaches

Huang

Ding

Lang

et al. 2023

RPJ

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Purpose The purpose of this paper is to investigate the effect of strut size on the compressive response for selective laser-melted lattice structure with a body-centered cubic (BCC) unit cell. Design/methodology/approach Theoretical analysis and numerical simulation were used to predict the compressive stiffness and strength of the lattice structures with different struts, and compression testing was conducted to validate the predicted results. The effect of strut size on actual porosity was determined with the dry weighting method. Scanning electron microscopy was used to observe the fracture morphologies. Findings The actual porosities in all the specimens turned out to be a little lower than the values expected from design. The maximum deviation appears at the strut size of 1.25 mm. The theoretical analysis reveals that the junctions of BCC unit cells are the most loaded points, and the maximum compression resistance load is proportional to the strut size. The stress–strain curves and collapse modes predicted by numerical simulation are in good agreement with the theoretical calculation and experimental results. The compression stress increases monotonously in strut size of 0.50–2.00 mm. The fracture morphologies reflect a transition from a mixed to ductile fracture mechanism. The lattice structure shows a stable plastic deformation without a destructive fracture for the strut size of 2.00 mm. Originality/value The findings of this study can provide theoretical and experimental support for the choice of strut size under different stress conditions. In addition, they are conductive to in-depth study of the compressive properties for lattice structures with different geometrical dimensions fabricated by selective laser melting.

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“…Wicks are the main component of loop heat pipe (LHP) systems, highly efficient heat transfer devices quite appreciated in the aerospace and electronics industries [ 8 , 9 , 10 ]. The wicks allow the coolant to flow self-propelled through its porous structure without the need for an external pump.…”

Section: Introductionmentioning

confidence: 99%

“…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%

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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Fabricating metal wicks by LMC-like continuous directional freeze casting

Cited by 10 publications

References 16 publications

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

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

Compressive response of selective laser-melted lattice structures with different strut sizes based on theoretical, numerical and experimental approaches

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

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