The preparation and properties of SiCw/B4C composites infiltrated with molten silicon

Jieli, Wang; Wen-song, Lin; Jiang, Ziwang; Duan, Lufen; Yang, Guoliang

doi:10.1016/j.ceramint.2013.12.003

Cited by 25 publications

(12 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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: 91%

Microstructural evolution of SiC powder in molten silicon

Roger

Petitcorps

2018

Ceramics International

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 91%

Microstructural evolution of SiC powder in molten silicon

Roger

Petitcorps

2018

Ceramics International

View full text Add to dashboard Cite

show abstract

“…The liquid silicon infiltration (LSI) process is a fast and straightforward method to fabricate large‐size dense B 4 C or SiC ceramics with complex shapes at a low temperature of 1600°C . Moreover, a ternary boron carbide based compound B 12 (B, C, Si) 3 was found at the surface of the original boron carbide particles …”

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

View full text Add to dashboard Cite

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.

show abstract

“…Boron carbide (B 4 C) ceramic has been widely used in various engineering fields, such as light-weight armor, high-temperature thermoelectric conversion elements, sliding bearings, seal rings, nozzles, and wear parts [1][2][3], due to its excellent properties of high hardness, high strength, low density, good high-temperature stability, high neutron absorption cross section and so on [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of B4C-based ceramic composites with different mass fractions of hexagonal boron nitride

Gao

et al. 2015

Ceramics International

View full text Add to dashboard Cite

The preparation and properties of SiCw/B4C composites infiltrated with molten silicon

Cited by 25 publications

References 20 publications

Microstructural evolution of SiC powder in molten silicon

Microstructural evolution of SiC powder in molten silicon

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

Fabrication and characterization of B4C-based ceramic composites with different mass fractions of hexagonal boron nitride

Contact Info

Product

Resources

About

The preparation and properties of SiCw/B4C composites infiltrated with molten silicon

Cited by 25 publications

References 20 publications

Microstructural evolution of SiC powder in molten silicon

Microstructural evolution of SiC powder in molten silicon

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

Fabrication and characterization of B4C-based ceramic composites with different mass fractions of hexagonal boron nitride

Contact Info

Product

Resources

About

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