Fabrication and oxidation resistance of mullite/yttrium silicate multilayer coatings on C/SiC composites

Ma, Qingsong; Cai, Li-hui

doi:10.1007/s40145-017-0248-y

Cited by 43 publications

(17 citation statements)

References 25 publications

(48 reference statements)

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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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“…However, since a large amount of gas products, such as CO 2 and CO, are released during the oxidation of SiC, large bubbles formed will expose a fresh surface after bursting, and channels for oxygen diffusion will also be formed, which will reduce the protective effect of the glass lm [23]. As one of multitudinous silicides, MoSi 2 is a kind of material with dual characteristics of metal and ceramic, and it is able to produce a continuous SiO 2 glass layer to protect its substrate from oxidation at temperatures as high as 1700 ℃ [24]. As a result, it has already been used in the preparation of electric heating elements.…”

Section: Introductionmentioning

confidence: 99%

Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range

Ren

et al. 2020

Preprint

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TaB2-SiC coating modified by different content of MoSi2 was fabricated on graphite substrate with SiC inner coating by liquid phase sintering to elevate the anti-oxidation capability of the TaB2-SiC coatings. As compared to the sample with the TaB2-40wt.%SiC coating, the coating sample modified with MoSi2 exhibited a weight gain trend at lower temperatures, the fastest weight loss rate went down by 76%, and the relative oxygen permeability value reduced from about 1% to near 0. More importantly, the large amount of SiO2 glass phase produced over the coating during oxidation was in contact with the modification of MoSi2, which was proved to be beneficial to the dispersion of Ta-oxides. A concomitantly formed continuous Ta-Si-O-B compound glass layer showed excellent capacity to prevent oxygen penetration. However, when the TaB2 content was sacrificed to increase the MoSi2 content, the relative oxygen permeability of the coating increased instead of decreased. Thus, on the basis of ample TaB2 content, increasing the MoSi2 content of the coating is conducive to reducing the relative oxygen permeability of the coatings in a broad temperature region.

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“…In despite of some advantages such as low density, low thermal expansion, desirable thermal stability, and oxidation resistance [1][2][3][4][5][6], the inherent brittle fracture behavior limits the structural applications of mullite ceramics. Incorporating the second phases can improve the fracture toughness of monolithic mullite.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites

Zhang

Zeng

et al. 2019

J Adv Ceram

Self Cite

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For the wide application as thermal protection materials, it is very necessary for mullite ceramics to improve fracture toughness. In this paper, the laminated and stitched carbon fiber cloth preform reinforced mullite (C/mullite) composites were prepared through the route of sol impregnation and heat treatment using the Al 2 O 3 −SiO 2 sol with a high solid content as raw materials. The C/mullite composites showed a flexural strength of 228.9 MPa that was comparable to that of dense monolithic mullite although the total porosity reached 13.4%. Especially, a fracture toughness of 11.2 MPa•m 1/2 that was 4-5 times that of dense monolithic mullite was obtained. Strength deterioration due to the carbothermal reduction between carbon fiber and the residual SiO 2 in matrix was found above 1200 ℃. A pyrolytic C (PyC) coating was deposited on carbon fibers as interfacial coating. The chemical damage to carbon fibers was obviously alleviated by the sacrifice of PyC coating. Accordingly, the C/PyC/mullite composites kept strength unchanged up to 1500 ℃, and showed much higher strength retention ratio than C/mullite composites after annealing at 1600 ℃.

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Fabrication and oxidation resistance of mullite/yttrium silicate multilayer coatings on C/SiC composites

Cited by 43 publications

References 25 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

Influence of MoSi2 on oxidation protective ability of TaB2-SiC coating in oxygen-containing environments within a broad temperature range

Mechanical properties and thermal stability of carbon fiber cloth reinforced sol-derived mullite composites

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