The effect of cellular structure on the strength and combustion properties of SiC porous ceramics

Liang, Xiong; Li, Yawei; He, Zhu; Yan, Weiping; Tan, Fangguan; Wang, Qinghu; Zhu, Tianbin; Sang, Shaobai

doi:10.1016/j.ceramint.2021.10.036

Cited by 11 publications

(4 citation statements)

References 31 publications

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“…Owing to the existence of pores, porous metallic materials give them the dual attributes of being structural and functional [1,2], which has attracted much attention in recent years. With many extraordinary characteristics, such as low relative density, large specific surface area, lightweight, sound insulation, and energy absorption, porous metals are widely applied in lightweight [3,4], medical implants [5][6][7], filtration and separation [8,9], sound absorption and noise reduction [10][11][12], heat exchange [13][14][15] and battery catalysis [16,17]. Therefore, a porous structure with channeled pores and pore sizes less than 100 µm plays a particularly important role in physical and chemical performance owing to the excellent connectivity and high specific surface area of the micropores.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Particle-Stacking Microporous Metal Using Laser Powder Bed Fusion

Qiu,

Xu,

Chen

et al. 2024

Coatings

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Laser powder bed fusion can fabricate porous structures through lattices, but the preparation of micropores (<50 μm) with a specific pore distribution remains a challenge. Microporous 316L was fabricated by controlling the melting and solidification behavior of the particles using laser energy. The laser energy density was not a determining factor for the porosity and micropore formation, except for the single-factor condition. The high-speed scanning mode required a higher laser power to disorder the pore distribution, whereas low-speed scanning with a low laser impact on the stacking particles formed organized pores. The hatch distance significantly affected the pore distribution and pore size. The pore distribution in the XY plane was organized and homogenous, with channeled pores mainly interconnected along the laser scanning tracks, whereas in the Z direction, it showed a relatively disordered distribution, mainly linked along the layered direction. The microporous 316L displayed a mean pore size and median pore size of 10–50 μm with a high-percentage size distribution in 1–10 μm, a controllable porosity of 17.06%–45.33% and a good yield strength of 79.44–318.42 MPa, superior to the lattice porous 316L with 250.00 MPa at similar porosity.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Particle-Stacking Microporous Metal Using Laser Powder Bed Fusion

Qiu,

Xu,

Chen

et al. 2024

Coatings

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“…SiC porous ceramics are a kind of “green functional material”. Due to their high porosity, low bulk density, large specific surface area, good permeability, easy cleaning and regeneration, high temperature resistance, thermal shock, corrosion, and mass loading [ 1 , 2 , 3 , 4 , 5 ], SiC porous ceramics have shown promising applications in many fields, such as catalyst carriers, gas-liquid filtration, thermal insulation, biomaterials, and sensors [ 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of SiC Porous Ceramics by Foaming Method

et al. 2023

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In this work, hierarchically porous SiC ceramics were prepared via the foaming method. Porous ceramics with tunable, uniform, and bimodal pore structures were successfully fabricated in a facile way. The formation mechanisms of the 1st and 2nd modal macropores are the H2O2 foaming process and SiC particle overlap, respectively. The effect of pore-foaming agent amount, foaming temperature, and surfactant was investigated. According to the results, with increasing H2O2 amount, the porosity, pore size, and interconnectivity of the 1st modal pores increased, whereas bulk density and strength decreased. The porosity increased while the strength decreased as the foaming temperature increased. Surfactants increased pore interconnectivity and porosity. When the foaming temperature was 85 °C, and the addition of H2O2 was 5 wt.%, the porosity, bulk density, flexural strength, and compressive strength were 56.32%, 2.8301 g/cm3, 11.94 MPa, and 24.32 MPa, respectively. Moreover, SiC porous ceramics exhibited excellent corrosion resistance to acids and alkalis.

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“…The structural design was found to be a good alternative to disordered foams with ordered porous structures that can better control porosity and structural stiffness. Decahedral diamond lattice structures have better combustion performance [6,7], and the geometry is homogeneous and does not generate combustion instabilities such as partial combustion.…”

Section: Introductionmentioning

confidence: 99%

The effect of the ceramic foam cell structure on the combustion performance of porous media burner: experimental study

Zheng,

Hu,

Chen

et al. 2023

J. Phys.: Conf. Ser.

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To investigate the effect of the ceramic foam cell structure on the combustion characteristics, a porous media burner(PMB) composed of foamed ceramic plates with Kelvin and WP cell models as structural features was designed and developed. The combustion chamber temperature, lean combustion limit, radiation efficiency and flue gas emission characteristics of the burner were analysed in the combustion of methane. The results show that with the same pore density, skeleton diameter and operating parameters, the combustion chamber temperature and radiation efficiency of the WP model are higher than those of the Kelvin model, while the CO and NOx emissions of WP model have an opposite tendency. When the ceramic foams are composed by WP cell model, under the same pore density and operating parameters, the burner has better combustion performance when the skeleton is thin. The combustion chamber temperature and radiation efficiency are higher, CO and NOx emissions are lower, and the lean combustion limit equivalent ratio is lower.

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The effect of cellular structure on the strength and combustion properties of SiC porous ceramics

Cited by 11 publications

References 31 publications

Fabrication of Particle-Stacking Microporous Metal Using Laser Powder Bed Fusion

Fabrication of Particle-Stacking Microporous Metal Using Laser Powder Bed Fusion

Fabrication of SiC Porous Ceramics by Foaming Method

The effect of the ceramic foam cell structure on the combustion performance of porous media burner: experimental study

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