(734i) Graphitization Control in Carbon-Carbon Composites By Graphene Addition
AIChE Annual Meeting
Wednesday, November 17, 2021 - 5:30pm to 5:45pm
This work characterizes a carbon-carbon composites from the nano- to the micron-scale with a variety of analytical techniques. Both graphitizing and non-graphitizing matrices are evaluated with three variations of graphene: 300-800 nm reduced graphene oxide, 1-2 um graphene nano-platelets and 2-5 Âµm graphene. The carbon-carbon composite so formed is then characterized at different length scales to understand the graphene additivesâ influence on the compositesâ observable macroscopic properties. The interaction is also addressed using polarized light microscopy  and scanning and transmission electron microscopy .
Carbon-carbon (C-C) composites are a unique class of materials consisting of a carbon filler within a carbon matrix [3,4]. This carbon matrix is typically formed after carbonization and graphitization of a carbon precursor material [5,6]. Fibers made from carbon precursors such as polyacrylonitrile (PAN), rayon or pitch are typically used as the filler weaved in varied directions to get desired properties within a resin or pitch-based matrix formed from a liquid precursor or by impregnation within a matrix formed from a gas precursor [3,7]. These are also referred to as carbon-fiber reinforced carbon composites [8,9]. Carbon-carbon composites have found application in the aerospace industry as aircraft disc brakes and rocket re-entry nose cones, for instance, because of their superior tensile strength, electrical conductivity, and integrity at high temperatures [7,8].
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