Effects of SiC whisker addition on mechanical, thermal, and permeability properties of porous silica‐bonded SiC ceramics

Lucio, Maria Dolores Sosa; Kultayeva, Shynar; Kim, Young‐Wook; Song, In‐Hyuck

doi:10.1111/ijac.13957

Cited by 11 publications

(11 citation statements)

References 75 publications

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“…Porous ceramics refer to porous ceramic materials with open and closed pore diameters and high porosity fired at high temperatures. They not only have large porosity, high specific surface area, and low density but also have the advantages of low thermal conductivity, and have excellent properties such as energy absorption, damping characteristics, and uniform gas-liquid permeability [ 1 – 3 ]. It is often widely used as melt, gas and solid filters, catalyst carriers, electrolytic membranes, high-pressure gas and sound wave-absorbing materials, thermal insulation materials, biomedical materials, etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Zhang

2022

International Journal of Analytical Chemistry

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Because of its excellent properties, mullite porous ceramics are widely used in thermal insulation materials, catalyst carriers, gas-liquid filtration, separation materials, etc. At the same time, zirconia not only has the advantages of high melting point, good chemical stability, and high strength but also can significantly improve the strength of ceramics through phase transformation and particle dispersion in the matrix and is widely used in the reinforcement of ceramics. In this paper, using mullite powder as the raw material, Al2O3 and SiO2/ZrSiO4 as the starting material for the mullite self-bonding phase, and AlF3·3H2O, ZrO2, and Y2O3 as additives, the zirconia-reinforced mullite was prepared by the foaming-injection method. The volume density, linear shrinkage rate, microstructure, room temperature, etc. of nanozirconia-reinforced mullite porous ceramics were studied by the amount of the foaming agent, the amount of mullite self-bonding phase powder, the type and amount of additives, etc. Effects of mechanical properties and thermal conductivity were also analyzed. The research results show that zirconia-reinforced mullite porous ceramics were prepared with mullite powder and 6 wt% AlF3·3H2O as raw materials, and ZrO2 and Y2O3 as additives. Adding an appropriate amount of ZrO2 and Y2O3 can significantly improve the mechanical properties of porous ceramics. When ZrO2 is 6 wt% and Y2O3 is 8 wt%, the porosity is 66.4% and the flexural strength and compressive strength of porous ceramics with a large pore size of 168 μm can reach 14.3 MPa and 36.3 MPa, respectively, which are obviously better than the strength of mullite porous ceramics without adding Y2O3 (flexural strength 11.3 MPa, nanocompressive strength 29.4 MPa).

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Section: Introductionmentioning

confidence: 99%

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Zhang

2022

International Journal of Analytical Chemistry

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“…Figure 12 shows the flexural strength of the newly developed porous SiC ceramics as a function of the porosity, and a comparison with literature values 34,40,45,81–87 . The flexural strengths of the newly developed porous SiC ceramics sintered in argon (SCA) and nitrogen (SCN) atmospheres increase from 8.6 to 32.9 MPa and from 8.1 to 27.9 MPa while decreasing the porosity from 68.2 to 58.3% and from 70.3 to 61.7%, respectively.…”

Section: Resultsmentioning

confidence: 95%

“…However, the SCA1.5 specimen shows an even higher flexural strength of 32.9 MPa at 58.3% porosity than those of the above ceramics. The flexural strength value of SCA1.5 is the highest flexural strength among porous SiC ceramics with a porosity of > 58% 34,40,45,81–87 …”

Section: Resultsmentioning

confidence: 96%

“…The flexural strength value of SCA1.5 is the highest flexural strength among porous SiC ceramics with a porosity of > 58%. 34,40,45,[81][82][83][84][85][86][87] The superior flexural strengths of SCA0.5-SCA1.5 (27.3−32.9 MPa) relative to those of other porous SiC ceramics in the porosity range of 58.3%−64.3% are owing to the formation of the well-developed wide necking area between SiC grains (Figure 2B-D). This is caused by the enhanced mass transport of the Si and C atoms from adding B 4 C 65 and sintering in an argon atmosphere.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…22,40 Figure 12 shows the flexural strength of the newly developed porous SiC ceramics as a function of the porosity, and a comparison with literature values. 34,40,45,[81][82][83][84][85][86][87] The flexural strengths of the newly developed porous SiC ceramics sintered in argon (SCA) and nitrogen (SCN) atmospheres increase from 8.6 to 32.9 MPa and from 8.1 to 27.9 MPa while decreasing the porosity from 68.2 to 58.3% and from 70.3 to 61.7%, respectively. The SCA0.5 and SCA1.0 show flexural strengths of 27.3 and 29.5 MPa, respectively, that is, slightly higher than those of the SCN1.0 and SCN1.5 specimens (23.9 and 27.9 MPa, respectively) at equivalent porosities of approximately 64.5% and approximately 61.8%, respectively.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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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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Phase evolution and mechanical performance of red mud-gypsum waste derived activator composite cementitious materials exposed to various Ca/Si and Al/S ratios

Chang,

Li,

Liu

et al. 2024

Construction and Building Materials

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Effects of SiC whisker addition on mechanical, thermal, and permeability properties of porous silica‐bonded SiC ceramics

Cited by 11 publications

References 75 publications

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties

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

Phase evolution and mechanical performance of red mud-gypsum waste derived activator composite cementitious materials exposed to various Ca/Si and Al/S ratios

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