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Two-dimensional carbon-fiber reinforced carbon-carbon (C/C) composites were implanted with boron ions with 70–360 keV energy, then annealed in an argon atmosphere at 1550°C, and finally coated with a CVD-SiC coating of 50 μm. Isothermal and cyclic oxidation tests were performed on the CVD-SiC...
We present the results of transmission electron microscopy (TEM) and electron energy loss spectrometry (EELS) studies on two carbon–boron alloys both prepared by chemical vapour deposition at ca. 1000°C and differing in their (Boron)/(Carbon) atomic ratio as well as in their morphology. In...
The total surface area, micropore volume, and fractal dimensions of five different carbons (Sorbonorite 4, GAC 1240, and three amorphous carbons) were evaluated from analysis of gas (N 2 ) and liquid (phenanthrene) adsorption isotherm data. The modified BET and fractal Frenkel–Halsey–Hill...
Soot produced from graphite through arc discharge was separated into four fractions which were structurally analyzed. The toluene-soluble fraction carried C 60 , C 70 , and C 76 –C 120 fullerenes while the toluene-insoluble quinoline-soluble fraction (ca. 1 wt%) consisted of larger clusters of...
Interactions between methanol and the carbon-supported catalysts have been investigated by in situ infrared spectroscopy. The pure, nonoxidized carbon itself is unreactive in decomposition of methanol. FTIR spectra showed that methanol adsorbed molecularly on oxidized carbon surface dissociated...
A glassy carbon, P3, obtained by carbonization of polyfurfuryl alcohol was used to study the changes produced by oxygen plasma treatments which were compared to those obtained by molecular oxygen. The sample was selected for its well defined mesoporosity. The aim was to study the influence of...
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