Synthesis of Mesoporous Carbon‐Bonded <scp>TiC/SiC</scp> Composites by Direct Carbothermal Reduction of Sol–Gel Derived Monolithic Precursor

Zhong, Jie; Liang, Shuquan; Wang, Kun; Wang, Huanting; Williams, Tim; Huang, Han; Cheng, Yi‐Bing

doi:10.1111/j.1551-2916.2011.04662.x

Cited by 18 publications

(13 citation statements)

References 54 publications

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“…and Wang et al . noting the effects of the block copolymer surfactant when removed by the 550°C decomposition, leaving a carbon matrix with oxide crystallites separated by pores …”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Evolution of Zirconium Carbide via Sol–Gel Route: Features of Nanoparticle Oxide–Carbon Reactions

et al. 2013

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A sol–gel route was used to synthesize nanocrystalline zirconium carbide (ZrC). The starting materials were zirconium propoxide, with carbon introduced by furfuryl alcohol (FA). A block copolymer surfactant was used to homogenize the oxide and carbon components. ZrC was produced at a low temperature of 1250°C and complete conversion achieved at 1450°C. The powder was nanocrystalline size less than 100 nm. Phase changes were studied using X‐ray diffraction and Raman spectroscopy. Rietveld analysis followed the changes in crystallite size and lattice parameters of the phases during carbothermal reduction. Morphology changes were observed using nitrogen gas sorption. High‐resolution TEM and EDS were used to image the carbide lattice, surface oxides, and graphene‐like carbons. The results indicate that nanoparticle carbothermal synthesis involves agglomeration and necking as the most viable mode of mass transport to complete the carbothermal reduction.

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“…and Wang et al . noting the effects of the block copolymer surfactant when removed by the 550°C decomposition, leaving a carbon matrix with oxide crystallites separated by pores …”

Section: Resultsmentioning

confidence: 99%

“…) can be considered a dense material, with interparticle carbons. Gas sorption can resolve the pores from PFA‐derived carbon because they are still in micropore–mesopore range after surfactant burn out at 550°C . Heat treatment results in gradual consumption of interparticle carbon or ordering of carbon between the oxides.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Evolution of Zirconium Carbide via Sol–Gel Route: Features of Nanoparticle Oxide–Carbon Reactions

et al. 2013

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“…To achieve the desired fiber products, it was important to formulate the starting sol‐gel compositions with the desired carbon content and with suitable viscosity for FS. The carbon content in the solutions was controlled via FA, due to its ability to polymerize to polyfurfuryl alcohol (PFA) and upon heat treatments hold ceramic grains in a carbon network . This pyrolysis heat treatment was undertaken at 550°C in N 2 , which converted the PFA to carbon at a designed ratio.…”

Section: Resultsmentioning

confidence: 99%

Creation of Titanium and Zirconium Carbide Fibers with the Forcespinning Technique

Firbas

Seeber

Cheng

2016

Int J Applied Ceramic Tech

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The forcespinning (FS) technique is used here to produce titanium dioxide and carbon composite fibers, as well as zirconium dioxide and carbon composite fibers. Subsequent carbothermal reduction of these fibers facilitated the creation of titanium carbide and zirconium carbide fibers respectably. The role of FS parameters such as the revolutions per minute (RPM) and the collector distance employed is examined. Sol-gel chemistry is used to produce the solutions for the initial FS, and the control of sol-gel chemistry and its effect on the end fiber products is also investigated. The effect of these variables is examined using X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. The results confirm that titanium and zirconium carbide fibers can be produced using the sol-gel and FS techniques.

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“…27 The grain size was not uniform for samples with a low C/Ti ratio. A bi-model distribution of grains existed, where some grains remained in a nano scale and some were coarsened to several microns ( Fig.…”

Section: Microstructures With Different C/ti Ratios In the Precursorsmentioning

confidence: 98%

“…The Ti-O-C precursor is a sol-gel mixture of titanium alkoxide and furfuryl alcohol (FA), which is as the carbon source. [18][19][20] In the present work, novel graphene/TiC composites featuring uniformly distributed graphene sheets and fine TiC grains (the grain size was less than 100 nm) were synthesized. This composite material showed improved toughness and generous energy absorption upon (lowvelocity) impact.…”

Section: Introductionmentioning

confidence: 99%

Graphene/titanium carbide composites prepared by sol–gel infiltration and spark plasma sintering

Wang

Qiu

et al. 2016

Ceramics International

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, Graphene/titanium carbide composites prepared by solgel infiltration and spark plasma sintering, Ceramics International, http://dx.doi.org/ 10. 1016/j.ceramint.2015.08.017 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ------------ † Author to whom correspondence should be addressed. e-mail: yibing.cheng@monash.edu AbstractGraphene/titanium carbide composites were synthesized by means of sol-gel infiltration and spark plasma sintering (SPS). The graphene used in this research was casted into a sponge-like shape, composed of a three-dimensional (3D) network of graphene sheets. The sol-gel infiltration synthesis method allowed the formation of nanostructured ceramics inside the porous structure of graphene networks, thus forming composites. The compositions and microstructures of the Ti-O-C composites changed with the amount of the polymerizable carbon source (i.e. furfuryl alcohol (FA)) in the solution. A high carbon ratio was required to maintain the structure of the graphene network, as the graphene sheets could become a carbon source to react with TiO 2 resulting in a lamellar-shaped grain morphology. Samples after SPS showed some toughening effects, such as de-bonding, bridging and formation of microcracks. Vickers hardness, electrical resistivity and thermal conductivity were examined for the composites.

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Synthesis of Mesoporous Carbon‐Bonded TiC/SiC Composites by Direct Carbothermal Reduction of Sol–Gel Derived Monolithic Precursor

Cited by 18 publications

References 54 publications

Synthesis and Evolution of Zirconium Carbide via Sol–Gel Route: Features of Nanoparticle Oxide–Carbon Reactions

Synthesis and Evolution of Zirconium Carbide via Sol–Gel Route: Features of Nanoparticle Oxide–Carbon Reactions

Creation of Titanium and Zirconium Carbide Fibers with the Forcespinning Technique

Graphene/titanium carbide composites prepared by sol–gel infiltration and spark plasma sintering

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