Tuning pore structure of corrosion resistant solid-state-sintered SiC porous ceramics by particle size distribution and phase transformation

Guo, Wei‐Ming; Xiao, Hanning; Yao, Xinghe; Liu, Jingxiong; Liang, Jianjun; Gao, Pengzhao; Zeng, Guangming

doi:10.1016/j.matdes.2016.03.105

Cited by 36 publications

(13 citation statements)

References 32 publications

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“…The composition analysis before and after metallization was performed with Energy Dispersive X-ray spectroscopy (EDS, TN-4700). The glass phase content in the alumina was measured by the etching method [29]. The phase composition of the metallized layer on the alumina surface was determined by XRD (X'Pert, PRO) with nickel filtered Cu K radiation produced at 40 kV and 27.5 mA, at a scanning rate of 5 o 2-theta/min.…”

Section: Characterizationmentioning

confidence: 99%

Influence of ceramic substrate porosity and glass phase content on the microstructure and mechanical properties of metallized ceramics via an activated Mo-Mn method

Wang

Kang

Gao

et al. 2020

Ceramics International

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Section: Characterizationmentioning

confidence: 99%

Influence of ceramic substrate porosity and glass phase content on the microstructure and mechanical properties of metallized ceramics via an activated Mo-Mn method

Wang

Kang

Gao

et al. 2020

Ceramics International

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“…Our recent research 40 suggested that BN addition was very effective in increasing both the flexural strength and thermal conductivity of such ceramics owing to the formation of a wide necking area between SiC grains, and that the electrical resistivity could be decreased by N‐doping the SiC lattice. Furthermore, several studies have reported on the effects of adding B 4 C to porous SiC ceramics, and specifically the effects on the mechanical properties 8,22,28,57 . Guo et al 8,57 .…”

Section: Introductionmentioning

confidence: 99%

Electrical, thermal, and mechanical properties of porous silicon carbide ceramics with a boron carbide additive

Kultayeva

Kim

2022

Int J Applied Ceramic Tech

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The effects of the boron carbide (B4C) content and sintering atmosphere on the electrical, thermal, and mechanical properties of porous silicon carbide (SiC) ceramics were investigated in the porosity range of 58.3%–70.3%. The electrical resistivities of the nitrogen‐sintered porous SiC ceramics (∼10–1 Ω·cm) were two orders of magnitude lower than those of argon‐sintered porous SiC ceramics (∼101 Ω·cm). Both the thermal conductivities (3.3–19.8 W·m–1·K–1) and flexural strengths (8.1–32.9 MPa) of the argon‐ and nitrogen‐sintered porous SiC ceramics increased as the B4C content increased, owing to the decreased porosity and increased necking area between SiC grains. The electrical resistivity of the porous SiC ceramics was primarily controlled by the sintering atmosphere owing to the N‐doping from the nitrogen atmosphere, and secondarily by the B4C content, owing to the B‐doping from the B4C. In contrast, the thermal conductivity and flexural strength were dependent on both the porosity and necking area, as influenced by both the sintering atmosphere and B4C content. These results suggest that it is possible to decouple the electrical resistivity from the thermal conductivity by judicious selection of the B4C content and sintering atmosphere.

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“…Particle packing methods are greatly influenced by the size of SiC powder and particle size distribution because the pore within SiC porous ceramics is formed from SiC powder accumulation. Therefore, the pore size can be controlled, and the strength of ceramic products can be improved by the proper particle grading composition of SiC powder [16][17][18][19]. However, it is difficult to obtain porous ceramics' high strength and high porosity simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Effects of particle grading composition of SiC on properties of silicon-bonded SiC porous ceramics

Zhao

Zhuo

et al. 2022

Mater. Res. Express

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Silicon-bonded silicon carbide (SBSC) porous ceramics had been prepared by mixing two different particle size of SiC powder (coarse and fine) as aggregates for silicon carbide porous ceramics, adding metallic Si as the binder phase and firing at 1450 °C under argon atmosphere. Various combinations of SiC mixtures consisting of two different particle size and packing density were prepared, and the samples were investigated to understand apparent porosity, bending strength, pore size distribution, and microstructure. The result showed that mixing an appropriate proportion of SiC coarse and fine powders could not only improve the pore size distribution of SBSC porous ceramics but also significantly increase the bending strength compared with the single-particle size sample. The system had the highest free packing density when the ratio of coarse to fine SiC size was >2 and the coarse powder content was 60-70 wt%. The optimal bending strength, and apparent porosity were 37.53 MPa and 37.11% respectively when mixing 70 wt% of coarse powder (50.8 μm) and 30 wt% of fine powder (9.5 μm) and sintered at 1450 ℃ in an argon atmosphere. The material created had 100.3% increased bending strength, and 0.99% decreased porosity compared with the single-particle size sample (50.8 μm).

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Tuning pore structure of corrosion resistant solid-state-sintered SiC porous ceramics by particle size distribution and phase transformation

Cited by 36 publications

References 32 publications

Influence of ceramic substrate porosity and glass phase content on the microstructure and mechanical properties of metallized ceramics via an activated Mo-Mn method

Influence of ceramic substrate porosity and glass phase content on the microstructure and mechanical properties of metallized ceramics via an activated Mo-Mn method

Electrical, thermal, and mechanical properties of porous silicon carbide ceramics with a boron carbide additive

Effects of particle grading composition of SiC on properties of silicon-bonded SiC porous ceramics

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