Carbon fabrication from pitch, steps

Carbon fiber fabrication from pitch generally involves the following four steps ... 

The carbon-fibre fabrication from pitch generally involves the following four steps (i) pitch preparation, (ii) spinning and drawing, (iii) thermal stabilization and (iv) carbonization. An optional graphitization step (heat treatment above 2500 °C) is used for obtaining high-modulus carbon fibres (Scheme 4). 

Figure 2. Main steps In the fabrication of a carbon fiber from PAN or pitch precursors.

Carbon fibres are obtained from different organic fibres (precursors) by pyrolysis, which consists of decomposition into smaller molecules at high temperature. The process of fabrication of carbon fibres from special PAN fibres includes two steps oxidative stabilization at low temperature and carbonization at high temperature in an inert atmosphere. Due to the high cost of raw materials (e.g. PAN fibres) and of this production process, carbon fibres are still expensive. Carbon fibres may be also produced from crude oil deposits like pitches or asphalts. Three main groups of carbon fibres are considered as possible composite materials reinforcement ... 

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See also in sourсe #XX -- [ ]

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