KD-S SiCf/SiC composites with BN interface fabricated by polymer infiltration and pyrolysis process

Wang, Honglei; Gao, Shitao; Peng, Shuming; Zhou, Xingui; Zhang, Haibin; Zhou, Xiaosong; Li, Bin

doi:10.1007/s40145-018-0268-2

Cited by 49 publications

(24 citation statements)

References 42 publications

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“…In recent years, with increased demand on natural gas, and the aspiration to strengthen national energy security and increase energy efficiency, the production of synthetic natural gas (SNG) from coal or biomass has aroused widespread concern [9][10][11][12][13]. Being a good potential material, SiC has extensive applications in many fields, especially working in harsh environments as a support due to its excellent properties including high heat conductivity, thermal stability, mechanical strength, and chemical inertness [14][15][16][17][18][19]. SiC has been applied to various reactions, including methane reforming and combustion, Fischer-Tropsch synthesis, isomerization and dehydrogenation, among others [20,21].…”

Section: Introductionmentioning

confidence: 99%

Defect-Rich Nickel Nanoparticles Supported on SiC Derived from Silica Fume with Enhanced Catalytic Performance for CO Methanation

Song

Zhai

et al. 2019

Catalysts

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With the increased demands of environmental protection, recycling/utilization of industrial byproducts has attracted much attention from both industry and academic communities. In this work, silicon carbide (SiC) was successfully synthesized from industrial waste silica fume (SF) during metallic silicon production. Following this, Ni nanoparticles with many defects were supported on the as-obtained SiC by conventional impregnation method. The results showed that defect-rich Ni nanoparticles were dispersed onto the surface of SiC. The as-obtained Ni/SF-SiC exhibited an enhanced metal-support interaction between Ni and SiC. Furthermore, the density functional theory (DFT) calculations showed that the H2 and CO adsorption energy on Ni vacancy (VNi) sites of Ni/SF-SiC were 1.84 and 4.88 eV, respectively. Finally, the Ni/SF-SiC performed high catalytic activity with CO conversion of 99.1% and CH4 selectivity of 85.7% at 350 °C, 0.1 MPa and a gas hourly space velocity (GHSV) of 18,000 mL·g−1·h−1. Moreover, Ni/SF-SiC processed good catalytic stability in the 50 h continuous reaction.

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Section: Introductionmentioning

confidence: 99%

Defect-Rich Nickel Nanoparticles Supported on SiC Derived from Silica Fume with Enhanced Catalytic Performance for CO Methanation

Song

Zhai

et al. 2019

Catalysts

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“…Besides, the SiC matrix is almost distributed homogeneously and densely between the fibers. These structure features are quite different from the SiC f /SiC composites derived from polymer infiltration and pyrolysis (PIP) [23,24] and chemical vapor infiltration (CVI) [25,26], which show rather porous structures due to the restricted mass transfer during the fabrication process. The high temperature/pressure of NITE process adopted in present study contributes to the highly dense structure, but can also lead to high residual stress in the composites.…”

Section: Resultsmentioning

confidence: 68%

Residual stress variation in SiCf/SiC composite during heat treatment and its effects on mechanical behavior

et al. 2020

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Residual stress originated from thermal expansion mismatch determines the mechanical properties of ceramic matrix composites (CMCs). Here, continuous SiC fiber reinforced SiC matrix (SiCf/SiC) composites were fabricated by nano-infiltration and transient eutectic-phase (NITE) method, and the residual stress of the composites was investigated using high-temperature Raman spectrometer. With temperature increasing from room temperature to 1400 °C, the residual stresses of the matrix and the fiber decrease from 1.29 to 0.62 GPa and from 0.84 to 0.55 GPa in compression respectively, while that of the interphase decreases from 0.16 to 0.10 GPa in tension. The variation of residual stress shows little effect on the tensile strength of the composites, while causes a slight decrease in the tensile strain. The suppression of fiber/matrix debonding and fiber pulling-out caused by the residual stress reduction in the interphase is responsible for the decreasing tensile strain. This work can open up new alternatives for residual stress analysis in CMCs.

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“…Besides, the SiC matrix is almost distributed homogeneously and densely between the bers. These structure features are quite different from the SiC f /SiC composites derived from polymer in ltration and pyrolysis (PIP) [23,24] and chemical vapor in ltration (CVI) [25,26], which show rather porous structures due to the restricted mass transfer during the fabrication process.…”

Section: Resultsmentioning

confidence: 70%

Residual stress variation in SiCf/SiC composite during heat treatment and its effects on mechanical behavior

Chen

Cheng

Zhang

et al. 2020

Preprint

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Residual stress originated from thermal expansion mismatch determines the mechanical properties of ceramic matrix composites (CMCs). Here, continuous SiC fiber reinforced SiC matrix (SiCf/SiC) composites were fabricated by nano-infiltration and transient eutectic-phase (NITE) method, and the residual stress of the composites was investigated using high-temperature Raman spectrometer. With temperature increasing from room temperature to 1400℃, the residual stresses of the matrix and the fiber decrease from 1.29 GPa to 0.62 GPa and from 0.84 GPa to 0.55 GPa in compression respectively, while that of the interphase decreases from 0.16 GPa to 0.10 GPa in tension. The variation of residual stress shows little effect in the tensile strength of the composites, while causes a slight decrease in the tensile strain. The suppression of fiber/matrix debonding and fiber pulling-out caused by the residual stress reduction in the interphase is responsible for the decreasing tensile strain. This work can open up new alternatives for residual stress analysis in CMCs.

show abstract

KD-S SiCf/SiC composites with BN interface fabricated by polymer infiltration and pyrolysis process

Cited by 49 publications

References 42 publications

Defect-Rich Nickel Nanoparticles Supported on SiC Derived from Silica Fume with Enhanced Catalytic Performance for CO Methanation

Defect-Rich Nickel Nanoparticles Supported on SiC Derived from Silica Fume with Enhanced Catalytic Performance for CO Methanation

Residual stress variation in SiCf/SiC composite during heat treatment and its effects on mechanical behavior

Residual stress variation in SiCf/SiC composite during heat treatment and its effects on mechanical behavior

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