Preparation, microstructure, properties and foaming mechanism of a foamed ceramics with high closed porosity

Li, Xiangming; Zheng, Min; Li, Rui; Yuan, Guojian; Zhou, Guangyou; Zhu, Xiaotao; Ren, Guina

doi:10.1016/j.ceramint.2019.03.091

Cited by 25 publications

(1 citation statement)

References 24 publications

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“…After three times of vacuum pressure infiltration in silica sol solution, the strength and thermal conductivity of the sintered sample are increased by 63.56% and 21.14%, respectively. The results are consistent with the above analysis [28,29]. The porosity of the samples can be effectively reduced by the filling of silica sol solution into open pores in vacuum pressure infiltration, which can be confirmed by the SEM microstructure in Figure 12.…”

Section: Vacuum Pressure Infiltration Of Silica Sol Solution and High-temperature Sinteringsupporting

confidence: 88%

Fabrication of Natural Flake Graphite/Ceramic Composite Parts with Low Thermal Conductivity and High Strength by Selective Laser Sintering

Chen

et al. 2020

Applied Sciences

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The 3D graphite/ceramic composite prototyping parts directly prepared by selective laser sintering (SLS) were porous, which led to poor strength and low thermal conductivity. In order to obtain low thermal conductivity and high strength, its thermal conductivity and compressive strength were adjusted by changing the mixture powder composition and adding post-processing. The result showed that the addition of silicon powder in the mixture powder could significantly improve the compressive strength and thermal conductivity. The addition of expanded graphite was beneficial to the formation of the closed pores in the matrix, which slightly reduced the compressive strength but significantly reduced the thermal conductivity. The 3D graphite/ceramic composite part showed an order of magnitude improvement in compressive strength (from 1.25 to 13.87 MPa) but relatively small change in thermal conductivity (from 1.40 to 2.12 W·m−1K−1) and density (from 0.53 to 1.13 g·cm−3) by post-processing. Reasonable mixture powder composition and post-processing were determined and realized the possibility of fabricating a 3D graphite/ceramic composite part with low thermal conductivity but high compressive strength. Furthermore, it could be used for the repeated casting of steel castings, and through the comparative analysis of casting defects, the prepared graphite/ceramic composite part was expected to replace water glass sand mold.

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Section: Vacuum Pressure Infiltration Of Silica Sol Solution and High-temperature Sinteringsupporting

confidence: 88%

Fabrication of Natural Flake Graphite/Ceramic Composite Parts with Low Thermal Conductivity and High Strength by Selective Laser Sintering

Chen

et al. 2020

Applied Sciences

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Integrated Utilization of Vanadium-Titanium Magnetite Tailings for Synthesis of Lightweight Foamed Ceramics: Effect of Chemical Composition on the Properties and Phase Evolution

Jiang

Chen

et al. 2022

J. Sustain. Metall.

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Preparation and performance of electromagnetic wave absorbing foamed ceramics with high closed porosity and gradient SiC distribution

Zhou

Yang

et al. 2020

Ceramics International

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Preparation, microstructure, properties and foaming mechanism of a foamed ceramics with high closed porosity

Cited by 25 publications

References 24 publications

Fabrication of Natural Flake Graphite/Ceramic Composite Parts with Low Thermal Conductivity and High Strength by Selective Laser Sintering

Fabrication of Natural Flake Graphite/Ceramic Composite Parts with Low Thermal Conductivity and High Strength by Selective Laser Sintering

Integrated Utilization of Vanadium-Titanium Magnetite Tailings for Synthesis of Lightweight Foamed Ceramics: Effect of Chemical Composition on the Properties and Phase Evolution

Preparation and performance of electromagnetic wave absorbing foamed ceramics with high closed porosity and gradient SiC distribution

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