Pressureless sintering of fully ceramic microencapsulated fuels

Kim, Hyun‐Min; Kang, Eun Seo; Kim, Young‐Wook; Lim, Kwang-Young; Lee, Seoung-Jae

doi:10.1016/j.jeurceramsoc.2020.07.036

Cited by 14 publications

(4 citation statements)

References 32 publications

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“…Mercury porosimetry (AutoPore IV 9500 series, Micromeritics, Norcross, GA, USA) was performed to measure the pore size distributions and open porosities of selected samples. The detailed procedures employed for phase analysis using X‐ray diffraction (XRD), polytype determination using the Rietveld refinement method, and microstructure observation using scanning electron microscopy have been described in previous papers 33–35,42,45,46 …”

Section: Methodsmentioning

confidence: 99%

“…The detailed procedures employed for phase analysis using X-ray diffraction (XRD), polytype determination using the Rietveld refinement method, and microstructure observation using scanning electron microscopy have been described in previous papers. [33][34][35]42,45,46 The thermal conductivity analysis was performed on specimens with dimensions of 10 mm × 10 mm × 2 mm using a laser flash method in an argon atmosphere at 25 • C (LFA 447, Netzsch GmbH, Selb, Germany). The thermal conductivity was calculated using the following equation:…”

Section: Methodsmentioning

confidence: 99%

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

Lucio

Kultayeva

Kim

et al. 2021

Int J Applied Ceramic Tech

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The effects of SiC whisker addition into nano‐SiC powder‐carbon black template mixture on flexural strength, thermal conductivity, and specific flow rate of porous silica‐bonded SiC ceramics were investigated. The flexural strength of 1200°C‐sintered porous silica‐bonded SiC ceramics increased from 9.5 MPa to 12.8 MPa with the addition of 33 wt% SiC whisker because the SiC whiskers acted as a reinforcement in porous silica‐bonded SiC ceramics. The thermal conductivity of 1200°C‐sintered porous silica‐bonded SiC ceramics monotonically increased from 0.360 Wm–1K–1 to 1.415 Wm–1K–1 as the SiC whisker content increased from 0 to 100 wt% because of the easy heat conduction path provided by SiC whiskers with a high aspect ratio. The specific flow rate of 1200°C‐sintered porous SiC ceramics increased by two orders of magnitude as the SiC whisker content increased from 0 to 100 wt%. These results were primarily attributed to an increase in pore size from 125 nm to 565 nm and secondarily an increase in porosity from 49.9% to 63.6%. In summary, the addition of 33 wt% SiC whisker increased the flexural strength, thermal conductivity, and specific flow rate of porous silica‐bonded SiC ceramics by 35%, 133%, and 266%, respectively.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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

Lucio

Kultayeva

Kim

et al. 2021

Int J Applied Ceramic Tech

Self Cite

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“…TRISO particles are nuclear fuels kernels coated with three layers of pyrolytic carbon and one layer of SiC fabricated via fluidized bed chemical vapor deposition 27–29 . Moreover, the sintering temperature of the SiC matrix for the FCM fuels is also limited to suppress the overfiring of kernels and severe grain growth of SiC coating layer in TRISO particles 30 . Therefore, the development of a sintering strategy for the dense sintering of SiC nanopowder under low temperature and pressure is a very urgent task.…”

Section: Introductionmentioning

confidence: 99%

“…[27][28][29] Moreover, the sintering temperature of the SiC matrix for the FCM fuels is also limited to suppress the overfiring of kernels and severe grain growth of SiC coating layer in TRISO particles. 30 Therefore, the development of a sintering strategy for the dense sintering of SiC nanopowder under low temperature and pressure is a very urgent task.…”

Section: Introductionmentioning

confidence: 99%

Densification and enhancement of SiC particulate‐reinforced fine‐grain SiC ceramic

Zhao

Shi

Liu

et al. 2022

Int J Applied Ceramic Tech

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Dense sintering of SiC nanopowder under low temperature and pressure remains a big challenge, because of the great resistance caused by the severe agglomeration of nanopowder. A novel sintering strategy is proposed to prepare SiC composite ceramics by sintering the mixture of SiC nanopowder and SiC micron powder at low temperature and pressure. The SiC micron powder was in the size of 100 µm with little sintering activity, which was designed as a pressure conductor to promote the densification of SiC nanopowder. Experimental results showed that the SiC micron powder had a significant effect on increasing of the sintering density of nanopowder and improving the mechanical properties of SiC ceramics. An SiC composite ceramic with a relative density of 98%, a Vickers hardness of 22.6 GPa, and a fracture toughness of 5.43 MPa m 1/2 could be sintered by spark plasma sintering under 1700 • C and 30 MPa by adding 30 wt.% 100 µm SiC micron powder as reinforcements.

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Porous silicon carbide ceramics with directional pore structures by CVI combined with sacrificial template method

Cheng

et al. 2023

Ceramics International

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Pressureless sintering of fully ceramic microencapsulated fuels

Cited by 14 publications

References 32 publications

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

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

Densification and enhancement of SiC particulate‐reinforced fine‐grain SiC ceramic

Porous silicon carbide ceramics with directional pore structures by CVI combined with sacrificial template method

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