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Keywords:

acetylene as addition, carbon fibres optimization, influence of atmosphere, carbon fibres strength, fibers, Science & Technology, Physical Sciences, Chemistry, Inorganic & Nuclear, Chemistry, Physical, Chemistry, FIBERS, Inorganic & Nuclear Chemistry

Abstract:

Vapour Grown Carbon Fibres (VGCFs) prepared through the addition of different percentages of C2H2 to the starting CH4-H-2 mixture are studied. The fibres exhibit better mechanical properties than those created using CH4 as a single carbon supplier. The slightly endothermic nature of the CH4-H-2-C2H2 reaction, near the thermodynamic equilibrium, avoids the massive pyrolytic deposition of carbon. As a consequence the crystalline quality and mechanical properties are improved.