Nano-SiC implantation into the structure of carbon/graphite materials made by pyrolysis (carbonization) of the precursor system coal tar pitch/poly(dimethylsiloxane)

Conversion of the air-cured poly(dimethylsiloxane) {–O–Si(CH 3) 2–} n to SiC during co-pyrolysis with a coal tar pitch is studied with reference to the related SiO 2/pitch system. Each binary mixture is first homogenized at 160 °C followed by carbonization at 500 °C under argon to afford initial car...

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Bibliographic Details
Published in:	The Journal of physics and chemistry of solids Vol. 65; no. 2; pp. 647 - 653
Main Authors:	Czosnek, Cezary, Wolszczak, Janina, Drygaś, Mariusz, Góra, Marta, Janik, Jerzy F.
Format:	Journal Article Conference Proceeding
Language:	English
Published:	Oxford Elsevier Ltd 01-02-2004 Elsevier
Subjects:	Carbonization Composites Cross-disciplinary physics: materials science; rheology Exact sciences and technology Materials science Nanocrystalline New materials: theory, design, and fabrication Other materials Physics Pitch Poly(methylsiloxane) Silicon carbide Specific materials Carbonization Pitch Composites Silicon carbide Poly(methylsiloxane) Nanocrystalline Scanning electron microscopy Pyrolysis Fourier transformation Carbothermy Organic siloxane Implantation Raw materials Dispersion reinforced material XRD Infrared spectra Experimental study Binary mixtures Carbon Fabrication Nanoparticles Chemical conversion Composite materials Silicon Carbides Coal tar pitch Silicones Nanocrystal X-ray photoelectron spectra
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Summary:	Conversion of the air-cured poly(dimethylsiloxane) {–O–Si(CH 3) 2–} n to SiC during co-pyrolysis with a coal tar pitch is studied with reference to the related SiO 2/pitch system. Each binary mixture is first homogenized at 160 °C followed by carbonization at 500 °C under argon to afford initial carbonizates. In both cases, one part of the initial carbonizate is further pyrolyzed at 1300 °C and another part at 1650 °C under an argon flow resulting in composite products. All products are studied with FT-IR, XRD, and XPS spectroscopic methods supplemented with SEM and ‘wet’ Si-analyses, when applicable. Carbothermally assisted conversion of both silicon precursors to nanocrystalline SiC embedded in the evolving C-matrix, i.e. nano-SiC/C composites, is evident only after the 1650 °C carbonization stage.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0022-3697 1879-2553
DOI:	10.1016/j.jpcs.2003.10.045