Structure of carbon films derived from polycarbodiimide

✍ Scribed by M. Shioya; M. Nakatani; H. Kitano; A. Takaku; Y. Araki; Y. Takahashi; T. Suzuki

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 958 KB
• Volume: 34
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(96)00083-8

✦ Synopsis

The structure of carbon films derived from polycarbodiimide (PCDI) has been investigated in relation to carbonization temperature by using wide-and small-angle X-ray scatterings. Various parameters characterizing the microvoids in an anisotropic arrangement are deduced from the analysis of the small-angle X-ray scattering. The carbon layer planes of the crystallites tend to orient parallel to the film surface with the growth of the crystallites. It has been found from the comparison of the microvoid parameters determined on different X-ray optical geometries that the microvoids in the carbon films do not show preferential orientation even in a carbon film having a relatively high preferential orientation of crystallites. The density of the carbon films decreases at a faster rate with the growth of crystallites. A characteristic nature of carbon films from PCDI is that the development of crystallites is low in comparison with the development of microvoids. Various structural parameters for carbon fibers from different origins are shown for comparison.