Textures and structures in heterogeneous pitch-based carbon fibres (as-spun, oxidized, carbonized, and graphitized)
1993; Elsevier BV; Volume: 31; Issue: 1 Linguagem: Inglês
10.1016/0008-6223(93)90152-z
ISSN1873-3891
AutoresKhalid Lafdi, Sylvie Bonnamy, A. Oberlin,
Tópico(s)Chemical and Physical Properties of Materials
ResumoFour pitch-based carbon fibres (laboratory made): radial with wedge (I1), radial (I2), statistically radial (I3), and concentric (I4) were prepared from heterogeneous pitch (mixture of a gel and an isotropic phase). I 1 to I 4 have the same nanotexture (inheritance of the gel). When as-spun or oxidized, it is the association of a major component with channels. During carbonization, the two components coalesce into a zig-zag nanotexture. Fibrils of nongraphitizing carbon are the inheritance of the isotropic pitch. I 1 has a perfect radial orientation of the zig-zag. They are bent in periphery in I 2. In I 3 there is only a statistical tendency to be radial. A certain order is recovered in I 4 inside which the zig-zag are concentric.
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