Improving specific stiffness of silicon carbide ceramics by adding boron carbide

Kim, Gyoung-Deuk; Kim, Young‐Wook; Yong, Seok-Min; Jung, Wook Ki

doi:10.1016/j.jeurceramsoc.2022.08.003

Cited by 7 publications

(1 citation statement)

References 73 publications

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“…However, sintering SiC without sintering aids or high external pressure is difficult because of its strong covalent bond structure and low selfdiffusion coefficient [4]. To save energy in production, pressureless solid-state-sintered SiC using several sources of boron and carbon as the boron-carbon additive systems sintered at 1900℃ to 2050℃ have been reported [5,6]. The majority of boron can form solid solutions in the SiC grains, and carbon is used to remove silica (SiO2) layers on the SiC surfaces, the boron-carbon additive system has already been shown to be effective for enhancing densification progress [3,5,7].…”

Section: Introductionmentioning

confidence: 99%

Possibility of using boric acid and glutinous rice flour as additive for producing silicon carbide ceramic via pressureless solid-state sintering

JINNAPAT,

RATTANASING,

NAWAUKKARATHARNANT

et al. 2024

J Met Mater Miner

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This research aimed to investigate the possibility of using the mixture of boric acid and glutinous rice flour as a cost-efficient alternative additive for producing silicon carbide (SiC) ceramic sintered at 1800℃ via pressureless solid-state sintering. The results indicated that the addition of boric acid- glutinous rice flour mixture (10 wt%) in an appropriate ratio (0.5 by molar ratio) into the SiC mixture (90 wt%) enhanced the densification and flexural strength of sintered SiC samples. However, increasing boric acid/glutinous rice flour ratio reduces density and flexural strength. The 5.45 wt% carbon content was sufficient to remove the oxide layer of the SiC surface and improve the properties of SiC ceramic. In summary, the boric acid-glutinous rice flour mixture has a high potential to be used as an additive for producing dense and porous SiC ceramics via pressureless solid-state sintering.

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