Preparation and properties of coiled carbon fibers by the catalitic pyrolysis of acetylene S. MOTOJIMA, I. HASEGAWA, S. KAGIYA, S. ASAKURA, M. KAWAGUCHI and H. IWANAGA J. Phys. IV France, 03 C3 (1993) C3-599-C3-606 DOI: 10.1051/jp4:1993383