Advanced technology for fabrication of reaction-bonded SiC with controlled composition and properties

Гринчук, П. С.; Kiyashko, M. V.; Abuhimd, Hatem; Alshahrani, Mohammad; Solovei, D.; Stepkin, M. O.; Akulich, A. V.; Shashkov, M.D.; Кузнецова, Т. А.; Danilova-Tretiak, Svetlana M.; Evseeva, L. E.; Николаева, К. В.

doi:10.1016/j.jeurceramsoc.2021.05.017

Cited by 29 publications

(14 citation statements)

References 45 publications

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“…Therefore, the density of C/SiC preform still has a high growth rate after cyclic impregnation/carbonization is performed twice. However, the density of P3 increased by only 4.17% compared with P2, indicating that it is difficult to significantly increase the content of carbon in the C/SiC preform by the same process [ 16 ]. The calculation results of the content of carbon in C/SiC by using the weighting method and TG method are shown in Figure 6 .…”

Section: Resultsmentioning

confidence: 99%

“…The residual carbon is detrimental to the properties of RB-SiC [ 23 ]. Therefore, the theoretical optimal value of carbon content in C/SiC preforms was calculated by using Equation (2) [ 16 ]:

where μ (wt.%) is the maximum carbon content in C/SiC preform (avoiding the phenomenon of capillary channel blockage); Mc and Msic are the molar masses(g/mol) of carbon and SiC, respectively; Vsic1 (vol.%) is the volume fraction of SiC in the C/SiC preform; and W is the volume ratio of specimens before and after LSI. After 3D printing, the content of SiC in the green body was 47 vol.%.…”

Section: Resultsmentioning

confidence: 99%

“…PF and anhydrous ethanol were purchased from Shengda Insulation Material (Changchun, China) and Institute of Chemical Reagents (Beijing, China), respectively. Theoretically, the carbon content in C/SiC preforms can be increased by multiple cycles of impregnation/carbonization cycles [ 16 ]. The TG curve of PF is shown in Figure 2 .…”

Section: Methodsmentioning

confidence: 99%

“…However, there are few research studies on improving the mechanical properties of SiC prepared by SLA and LSI [ 10 , 12 , 15 ]. In terms of phase composition of the composites, it is necessary to decrease the content of Si, while increasing the content of SiC [ 16 ]. One of the most effective methods is to supplement carbon sources in the SiC green body, and then the carbon is converted into SiC via LSI techniques.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure Evolution and Performance Improvement of Silicon Carbide Ceramics via Impregnation Method

Guo

Cui

et al. 2022

Materials

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The high topological silicon carbide (SiC) ceramics can be prepared by stereolithography (SLA) combined with liquid silicon infiltration (LSI) techniques. This paper aims to enhance the performance of SiC ceramics prepared by SLA and LSI techniques via the cyclic impregnation/carbonization of the precursor of carbon source solution before LSI. The effects of impregnation/carbonization cycles on the microstructure and properties of C/SiC preform and sintered body were analyzed in detail. The results show that, with the increase of impregnation/carbonization cycles, the porosity in the C/SiC preform decreases obviously and the content of secondary SiC in the sintered body increases effectively. Especially, when the impregnation/carbonization cycle was performed twice, the sintered body had the optimal mechanical properties. The value of flexural strength, bulk density and elastic modulus were 258.63 ± 8.33 MPa, 2.95 ± 0.02 g/cm3 and 425.16 ± 14.15 GPa, respectively. In addition, the thermal dimensional stability of sintered body was also improved by this method. This method proves that SiC ceramics prepared by SLA combined with LSI have the potential of applications in space optical mirrors.

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Section: Resultsmentioning

confidence: 99%

“…The residual carbon is detrimental to the properties of RB-SiC [ 23 ]. Therefore, the theoretical optimal value of carbon content in C/SiC preforms was calculated by using Equation (2) [ 16 ]:

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure Evolution and Performance Improvement of Silicon Carbide Ceramics via Impregnation Method

Guo

Cui

et al. 2022

Materials

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“…C/SiC preceramics are prepared using the developed earlier technique [28][29][30][31] (Figure 1). Two grades of SiC powder M50 and M5 (an average particle size of 50 and 5 µm, respectively) in a proportion of 5:3 are mixed with 12.5 wt.% of paraffin-based binder and injected to a cylindrical mold under a pressure of .5 MPa.…”

Section: Fabrication and Characterization Of C/sic Preceramicsmentioning

confidence: 99%

High productive machining of C/SiC preceramics

Гринчук

Abuhimd

Kiyashko

et al. 2021

Int J Applied Ceramic Tech

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High productive machining of C/SiC preceramics is investigated in relation to the fabrication of complex‐shaped reaction‐bonded silicon carbide ceramics. Machinability is analyzed at different manufacturing steps of ceramics preparation. Machining after the carbonization step is shown to be the most efficient. Great value of material removal rate of 360 mm3/s is achieved by high productive CNC‐milling of carbonized preceramics at a feed rate of 50 mm/s without any defects upon the processed surfaces, edges, and corners. Diamond tool wears approximately .01% (weight loss per mass of material removed) in the process of green CNC‐milling is two orders lower compared with the milling of sintered ceramics (2.8%). Specifics of surface processing are investigated depending on carbon content in preceramics. The increase of bonding carbon from 8 to 16 vol.% decelerates loose abrasive grinding three times, improves the accuracy of surface leveling, and leads to a change of fracture mechanism. The obtained results can be helpful for the advantageous manufacture of complex‐shaped silicon carbide ceramics.

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Formation of Oxides Upon Thermal Debinding and Their Role in Obtaining Reaction-Bonded Silicon Carbide

Гринчук

Kiyashko

Stepkin

et al. 2023

J Eng Phys Thermophy

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Advanced technology for fabrication of reaction-bonded SiC with controlled composition and properties

Cited by 29 publications

References 45 publications

Microstructure Evolution and Performance Improvement of Silicon Carbide Ceramics via Impregnation Method

Microstructure Evolution and Performance Improvement of Silicon Carbide Ceramics via Impregnation Method

High productive machining of C/SiC preceramics

Formation of Oxides Upon Thermal Debinding and Their Role in Obtaining Reaction-Bonded Silicon Carbide

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