Preparation of Silicon Carbide Fiber from Activated Carbon Fiber and Gaseous Silicon Monoxide

Okada, Kaoru; Kato, Hitoshi; Nakajima, Keihachiro

doi:10.1111/j.1151-2916.1994.tb09782.x

Cited by 57 publications

(16 citation statements)

References 2 publications

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“…S ilicon carbide (SiC) nanomaterials are widely investigated due to high strength, good creep, oxidation resistance at elevated temperature, chemical inertness, thermal stability, and resistance to corrosion 1–4 . The size, shape, and surface composition of these nanostructured materials are some of the few factors that contribute to these unique and fascinating properties 5–7 .…”

Section: Introductionmentioning

confidence: 99%

“…S ILICON CARBIDE (SiC) nanomaterials are widely investigated due to high strength, good creep, oxidation resistance at elevated temperature, chemical inertness, thermal stability, and resistance to corrosion. [1][2][3][4] The size, shape, and surface composition of these nanostructured materials are some of the few factors that contribute to these unique and fascinating properties. [5][6][7] These extraordinary properties allow silicon carbide to be a suitable ceramic for numerous applications such as semiconducting devices to be used at high temperature and high frequency, 6 reinforcement in ceramic composites, 7 metal matrix composites, [8][9][10] and catalytic support.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Silicon Carbide Nanowires from a Hybrid of Amorphous Biopolymer and Sol–Gel‐Derived Silica

Mishra

Krause

et al. 2009

Journal of the American Ceramic Society

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We report here the formation of silicon carbide (SiC) nanowires from inorganic–organic hybrid of sol–gel‐derived silica and the commercially available lignin that is naturally abundant amorphous biopolymer. This organic–inorganic hybrid material in the absence of catalyst was carbothermally reduced for a period of 1 h at 1400°C in inert atmosphere followed by oxidization. The nanostructures were characterized by scanning electron microscopy and high resolution scanning electron microscopy, which show the continuous formation of β‐SiC nanowires in the range of 50–200 nm diameter and length of few micrometers. Transmission electron microscopy revealed Y‐shaped structures (branched) of the nanowires grown in the direction of parallel to the [100] plane having two heads and one leg. The nanowires were formed with joints that were formed at regular intervals as circular rings. The deposition of silica layer on the outer surface of the nanowires was also observed. According to the X‐ray diffraction pattern, peaks at 2θ=35.9° and 59.8° indicate the formation of β‐SiC and a sharp peak at 2θ=22.1° suggests the presence of unreacted crystalline silica (crystoballite). The Raman shifts for β‐SiC appeared as small peaks at 795.6 and 983.1 cm−1, respectively. The characteristic vibration of SiC at 795 cm−1 in Fourier transform infrared spectroscopy was also observed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Silicon Carbide Nanowires from a Hybrid of Amorphous Biopolymer and Sol–Gel‐Derived Silica

Mishra

Krause

et al. 2009

Journal of the American Ceramic Society

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“…5(a). Okada et al 18 reported on the synthesis of SiC fibers by reacting activated carbon fibers with gaseous silicon monoxide. The authors found that the resulting fibers had an unreacted carbon core, which could be removed by heating the fiber in air, resulting in a hollow SiC fiber.…”

Section: Resultsmentioning

confidence: 99%

The Relationship Between Microstructure and Fracture Toughness for Fibrous Materials for Diesel Particulate Filters

Gordon

Shyam

Lara‐Curzio

2010

Journal of the American Ceramic Society

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The Mode I fracture toughness of fibrous SiC and mullite materials with 60%–70% porosity was determined under ambient conditions using the double‐torsion test method. The fracture toughness values obtained were 0.27 and 0.34 MPa·m1/2 for fibrous SiC and mullite, respectively. These fibrous ceramics exhibit greater fracture resistance than porous monolithic ceramics with similar levels of porosity. A higher degree of cross‐linking between the fibers led to further improvement in the fracture characteristics of the fibrous material. The differences in fracture behavior can be explained by the microstructural differences between these two classes of materials. The combination of high porosity and high fracture toughness for fibrous materials makes them ideal candidates for applications in diesel particulate filtration.

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“…Researchers 30,31 found that different carbon fibers can be completely converted to SiC fiber under proper conditions by carbothermal reduction with a silicon source (SiO vapor or silica). Lee 30 thought the conversion of carbon fiber by carbothermal reduction of silica is related to the pore size of carbon substrate and the competition of two processes: the infiltration process of Si into a carbon substrate and the chemical reaction process between Si and C. Okada 31 proposed that SiO vapor diffuses into the activated carbon fiber through its micropores and reacts with the carbon, under proper conditions, where activated carbon fiber is completely converted to SiC fiber. At elevated temperature, the rate of this solid-state reaction must be slower than that of gas-solid reaction (3).…”

Section: Effect Of Carbon Source and Synthesis Temperature On The Smentioning

confidence: 99%

Preparation of SiC from acid‐leached coal gangue by carbothermal reduction

Guo

et al. 2018

Int J Applied Ceramic Tech

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For the comprehensive utilization of coal gangue, acid‐leached coal gangue was used as silicon source and part of carbon source, low ash anthracite and degreasing cotton were added respectively as supplementary carbon source, SiC and SiC fiber were prepared by carbothermal reduction method accordingly. The results show that the main components in leached coal gangue are amorphous SiO2 and carbon, which are suitable for the synthesis of SiC as raw materials. The synthesis temperature and holding time have important influence on the synthesis of SiC, and the optimum synthesis parameters for SiC are at 1550°C for 4 hours; under this condition, the yield of SiC is 78.27%, and the specific surface area is 6750 cm2/g. The results show that the resulting products are essentially composed of β‐SiC with a minor amount of α‐SiC. Besides, based on the carbon fiber transformation method, SiC fiber was prepared by using leached coal gangue and degreasing cotton as raw materials. Therefore, it can be concluded that leached coal gangue is a very effective and inexpensive source for preparing SiC, and more importantly, this work has important economic and social significance to realize waste recycling and control pollution.

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Preparation of Silicon Carbide Fiber from Activated Carbon Fiber and Gaseous Silicon Monoxide

Cited by 57 publications

References 2 publications

Synthesis of Silicon Carbide Nanowires from a Hybrid of Amorphous Biopolymer and Sol–Gel‐Derived Silica

Synthesis of Silicon Carbide Nanowires from a Hybrid of Amorphous Biopolymer and Sol–Gel‐Derived Silica

The Relationship Between Microstructure and Fracture Toughness for Fibrous Materials for Diesel Particulate Filters

Preparation of SiC from acid‐leached coal gangue by carbothermal reduction

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