Fabrication and characterization of a new-style structure capillary channel in reaction bonded silicon carbide composites

Song, Suocheng; Bao, Chonggao; Ma, Yana; Wang, Keke

doi:10.1016/j.jeurceramsoc.2017.02.023

Cited by 21 publications

(13 citation statements)

References 24 publications

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“…It was thus demonstrated that the presence of a low quantity of liquid during the SiC sintering at 1970°C for 6 hours was able to control the grain growth kinetic and the microstructure during the dissolution-precipitation transformation of β-SiC to α-SiC by generating a core/rim microstructure [12]. Several recent studies have also evidenced dissolution-precipitation processes during the infiltration of molten silicon into B4C-based materials [13][14][15].…”

Section: Introductionmentioning

confidence: 92%

Microstructural evolution of SiC powder in molten silicon

Roger

Petitcorps

2018

Ceramics International

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SiCpowder/Simatrix composites represent a new class of microstructurally toughened materials. The interactions between molten silicon and submicronic SiC powder have been considered since it could originate some limitations on the final properties of the material. Experiments putting in interaction a SiC powder and molten Si were performed while heating up to final values ranging between 1450 and 1600°C for duration up to 8 hours. The volume ratio of SiC and silicon was equal to one and SiC particles were freely dispersed within the liquid. X-ray diffraction analyses demonstrated that the apparent crystallites size increase of SiC powder followed a ripening law corresponding to a limitation either by volume diffusion or by dissolution into the liquid. Depending on the relevant mechanism, the activation energy of the crystallites' growth has been found equal to 35750 kJ.mol-1 or 44157 kJ.mol-1. An agglomeration-coarsening process of SiC particles was also identified which promoted a quick formation of larger particles.

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Section: Introductionmentioning

confidence: 92%

Microstructural evolution of SiC powder in molten silicon

Roger

Petitcorps

2018

Ceramics International

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“…Because the pressureless sintered B 4 C/C(graphite) composites have a porosity of about 25–38%, the liquid silicon could be conveniently infiltrated into the interior of the composites [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ], subsequently reacting with B 4 C and graphite to produce the silicon carbide [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. While the boron carbide reacted only partially [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ], the graphite reacted completely with silicon producing silicon carbide [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ]. The residual boron carbide and silicon existed within the matrix of the composite [ 40 , 41 , 42 , 43 , 44 , 45 , 46 <...…”

Section: Introductionmentioning

confidence: 99%

“…While the boron carbide reacted only partially [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ], the graphite reacted completely with silicon producing silicon carbide [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ]. The residual boron carbide and silicon existed within the matrix of the composite [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ] and together with silicon carbide gave rise to the B 4 C-SiC-Si composites [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ]. The pressureless sintered B 4 C/C(graphite) composites are thus transformed into the B 4 C-SiC-Si composites via the silicon infiltration process [ 40 ,…”

Section: Introductionmentioning

confidence: 99%

“…The residual boron carbide and silicon existed within the matrix of the composite [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 ] and together with silicon carbide gave rise to the B 4 C-SiC-Si composites [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ]. The pressureless sintered B 4 C/C(graphite) composites are thus transformed into the B 4 C-SiC-Si composites via the silicon infiltration process [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ]. The microstructural details, phase composition, and mechanical characteristics of the B 4 C/C(graphite) composites as well as B 4 C-SiC-Si composites fabricated by the silicon infiltration process were then investigated and compared.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Microstructural Features and Mechanical Characteristics of the Pressureless Sintered B4C/C(Graphite) Composites and the B4C-SiC-Si Composites Fabricated by the Silicon Infiltration Process

Jiang

2022

Materials

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The B4 C/C(graphite) composites were fabricated by employing a pressureless sintering process. The pressureless sintered B4 C/C(graphite) composites exhibited extremely low mechanical characteristics. The liquid silicon infiltration technique was employed for enhancing the mechanical property of B4 C/C(graphite) composites. Since the porosity of the B4 C/C(graphite) composites was about 25–38%, the liquid silicon was able to infiltrate into the interior composites, thereby reacting with B4 C and graphite to generate silicon carbide. Thus, boron carbide, silicon carbide, and residual silicon were sintered together forming B4 C-SiC-Si composites. The pressureless sintered B4 C/C(graphite) composites were transformed into the B4 C-SiC-Si composites following the silicon infiltration process. This work comprises an investigation of the microstructure, phase composition, and mechanical characteristics of the pressureless sintered B4 C/C(graphite) composites and B4 C-SiC-Si composites. The XRD data demonstrated that the pressureless sintered bulks were composed of the B4 C phase and graphite phase. The pressureless sintered B4 C/C(graphite) composites exhibited a porous microstructure, an extremely low mechanical property, and low wear resistance. The XRD data of the B4 C-SiC-Si specimens showed that silicon infiltrated specimens comprised a B4 C phase, SiC phase, and residual Si. The B4 C-SiC-Si composites manifested a compact and homogenous microstructure. The mechanical property of the B4 C-SiC-Si composites was substantially enhanced in comparison to the pressureless sintered B4 C/C(graphite) composites. The density, relative density, fracture strength, fracture toughness, elastic modulus, and Vickers hardness of the B4 C-SiC-Si composites were notably enhanced as compared to the pressureless sintered B4 C/C(graphite) composites. The B4 C-SiC-Si composites also manifested outstanding resistance to wear as a consequence of silicon infiltration. The B4 C-SiC-Si composites demonstrated excellent wear resistance and superior mechanical characteristics.

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“…Zhang et al found that B 4 C could be reinforced by introducing SiC through spark plasma sintering (SPS) at 1800°C; the resulting fracture toughness was 6.8 ± 0.2 MPa·m 1/2 . Song et al fabricated reaction‐bonded SiC composites with unique capillary channels using B 4 C powder mixtures with an appropriate multimodal particle‐size distribution to promote liquid silicon infiltration, and obtained fracture toughness as high as 6.2 ± 0.4 MPa·m 1/2 . To further enhance the fracture toughness of materials, Clegg et al synthesized bionic layered ceramics.…”

Section: Introductionmentioning

confidence: 99%

In situ toughened two‐phase B₁₂(C, Si, B)₃–SiC ceramics fabricated via liquid silicon infiltration

Sun

Bai

et al. 2018

J Am Ceram Soc

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In situ toughened B12(C, Si, B)3–SiC ceramics were successfully fabricated via the liquid silicon infiltration process. Two types of B12(C, Si, B)3 phases, with high and low Si contents, respectively, and plate‐like SiC particles were formed by the reaction between B4C and Si. The in situ toughening mechanism involved two effects: the multiple crack deflections caused by the increased grain boundaries, and the pullout and rupture of a significant amount of plate‐like SiC particles. Block ceramics with a high fracture toughness of 6.5 ± 0.5 MPa·m1/2 were fabricated via the in situ toughening mechanism. A strong interface bond was present between the high‐ and low‐B4C‐content layers in the laminated ceramics, which led to residual compressive stress inside the materials. As a result, the laminated structural design enhanced the fracture toughness to 7.5 ± 0.5 MPa·m1/2.

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Fabrication and characterization of a new-style structure capillary channel in reaction bonded silicon carbide composites

Cited by 21 publications

References 24 publications

Microstructural evolution of SiC powder in molten silicon

Microstructural evolution of SiC powder in molten silicon

Investigation of Microstructural Features and Mechanical Characteristics of the Pressureless Sintered B4C/C(Graphite) Composites and the B4C-SiC-Si Composites Fabricated by the Silicon Infiltration Process

In situ toughened two‐phase B₁₂(C, Si, B)₃–SiC ceramics fabricated via liquid silicon infiltration

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Fabrication and characterization of a new-style structure capillary channel in reaction bonded silicon carbide composites

Cited by 21 publications

References 24 publications

Microstructural evolution of SiC powder in molten silicon

Microstructural evolution of SiC powder in molten silicon

Investigation of Microstructural Features and Mechanical Characteristics of the Pressureless Sintered B4C/C(Graphite) Composites and the B4C-SiC-Si Composites Fabricated by the Silicon Infiltration Process

In situ toughened two‐phase B12(C, Si, B)3–SiC ceramics fabricated via liquid silicon infiltration

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In situ toughened two‐phase B₁₂(C, Si, B)₃–SiC ceramics fabricated via liquid silicon infiltration