Multi-walled carbon nanotube-reinforced silicon carbide fibers prepared by polymer-derived ceramic route

Hai-zhe, Wang; Li, Xiaodong; Ma, Jun; Li, Gongyi; Hu, Tianjiao

doi:10.1016/j.compositesa.2011.12.007

Cited by 26 publications

(10 citation statements)

References 38 publications

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“…Its high ceramic yield, relatively low shrinkage, ability to be handled, and to be processed in ambient conditions have attracted wide attention, especially as a precursor to SiC fibers and more recently as a matrix material . AHPCS has been researched as a binder for ceramic powders and matrix source for polymer‐derived ceramic matrix composites . It has also been used to join monolithic and composite ceramic parts .…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Evolution and Properties of Silicon Carbide Derived From a Preceramic Polymer Precursor

2013

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This study reports on the fabrication and characterization of polymer-derived amorphous and nano-grained SiC, by controlled pyrolysis of allylhydridopolycarbosilane (AHPCS) under inert atmosphere. Processing temperatures and hold times at final temperatures are varied to study the influence of processing parameters on the structure and resulting properties. Chemical changes, phase transformations, and microstructural changes occurring during the pyrolysis process are studied. Polymer cross-linking and polymer to ceramic conversion is studied using infrared spectroscopy (FTIR). Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) are performed to monitor the mass loss and phase change as a function of temperature. X-ray diffraction studies are performed to study the intermediate phases and microstructural changes. Hardness and modulus measurements are carried out using instrumented nanoindentation to establish processing-propertystructure relationship for SiC derived from the polymer precursor. It is seen that the presence of nanocrystalline domains in amorphous SiC significantly influences the modulus and hardness. A nonlinear relationship is observed in these properties with optimal mechanical properties observed for SiC processed to 1150°C for 1 h hold duration, having average grain size of 3 nm. In addition, bulk mechanical characterization, in terms of biaxial flexure strength, is done for SiC-SiC particulate composites purely derived from the polymer precursor.R. Reidel-contributing editor Manuscript No. 32369.

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Section: Introductionmentioning

confidence: 99%

Characterization of the Evolution and Properties of Silicon Carbide Derived From a Preceramic Polymer Precursor

2013

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“…Furthermore, the preceramic polymeric matrix can be converted into a SiC-CNT or SiCN-CNT ceramic matrix composite via pyrolysis [20]. Fields of interest are ceramic fibers [53], ceramic MEMS [54] and biomedical devices [55].…”

Section: Outlook and Possible Applicationsmentioning

confidence: 99%

Rapid carbon nanotubes suspension in organic solvents using organosilicon polymers

Dalcanale

Grossenbacher

Blugan

et al. 2016

Journal of Colloid and Interface Science

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A strategy for a simple dispersion of commercial multi-walled carbon nanotubes (MWCNTs) using two organosilicones, polycarbosilane SMP10 and polysilazane Ceraset PSZ20, in organic solvents such as cyclohexane, tetrahydrofuran (THF), m-xylene and chloroform is presented. In just a few minutes the combined action of sonication and the presence of Pt(0) catalyst is sufficient to obtain a homogeneous suspension, thanks to the rapid hydrosilylation reaction between SiH groups of the polymer and the CNT sidewall. The as-produced suspensions have a particle size distribution <1μm and remain unchanged after several months. A maximum of 0.47 and 0.50mg/ml was achieved, respectively, for Ceraset in THF and SMP10 in chloroform. Possible applications as polymeric and ceramic thin films or aerogels are presented.

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“…Conventional fiber reinforced ceramics exhibit substantially improved fracture toughness, due largely to crack bridging and energy dissipation associated with fiber pull-out [1][2][3][4][5][6][7][8][9][10] . Analogous approaches can be applied to nanoscale materials, where researchers have primarily tried to mimic these effects with carbon nanotubes (CNTs) which are roughly two orders of magnitude smaller than conventional carbon and ceramic fibers [11][12][13][14][15] . This reduction in size leads to important new questions -in particular, the extent to which the same toughening mechanisms are important at the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

The impact of core-shell nanotube structures on fracture in ceramic nanocomposites

2017

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Multi-wall carbon nanotubes (MWCNTs) can be used to create ceramic nanocomposites with improved fracture toughness. In the present work, atomic layer deposition (ALD) was employed to deposit thin oxide layers on MWCNTs. These core-shell structures were then used to create nanocomposites by using a polymer derived ceramic (PDC) to produce the matrix. Variations in both the initial MWCNT structure and the oxide layers led to substantial differences in fiber-pullout behavior. Single tube pullout tests also showed that the oxide coatings led to stronger bonding with the ceramic matrix. With high defect density MWCNTs, this led to shorter pull-out lengths which is consistent with the conventional understanding of fracture in ceramic matrix composites. However, with low defect density MWCNTs longer pullout lengths were observed with the oxide layers. To interpret the different trends that were observed, we believe that the ALD coatings should not be viewed simply as a means of altering the interfacial properties. Instead, the coated MWCNTs should be viewed as more complex core-shell fibers where both interface and internal properties can be controlled with the ALD layers.

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Multi-walled carbon nanotube-reinforced silicon carbide fibers prepared by polymer-derived ceramic route

Cited by 26 publications

References 38 publications

Characterization of the Evolution and Properties of Silicon Carbide Derived From a Preceramic Polymer Precursor

Characterization of the Evolution and Properties of Silicon Carbide Derived From a Preceramic Polymer Precursor

Rapid carbon nanotubes suspension in organic solvents using organosilicon polymers

The impact of core-shell nanotube structures on fracture in ceramic nanocomposites

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