Improvement of Manufacturing Technology for Ultrastrong and High-Modulus Carbon Fibres

Autor:	L. A. Zlatoustova, G. A. Budnitskii, M. B. Radishevskii, Serkov Arkadij T, V. A. Medvedev
Rok vydání:	2005
Předmět:	Materials science General Chemical Engineering Modulus Mesophase Young's modulus General Chemistry symbols.namesake Hardening (metallurgy) symbols General Materials Science Tempering Crystallite Composite material Porosity Spinning
Zdroj:	Fibre Chemistry. 37:327-331
ISSN:	1573-8493 0015-0541
DOI:	10.1007/s10692-006-0003-6
Popis:	1. The quality of CF, their strength and modulus of elasticity in particular, can be increased by the following methods: reducing the porosity of the initial PAN fibres by selecting the optimum conditions for spinning, plasticization drawing, finishing, and drying; decreasing the nonuniformity of the fibre diameter due to suppression of deformation resonance during spinning by selecting the jet formation and hardening conditions; decreasing the fibril and crystallite size by reducing the precipitator and solvent concentration gradient in the precipitation zone (spinning into mild baths); creating optimum conditions for mesophase self-ordering of the material at 450–550° C during precarbonization; increasing the cohesive energy by increasing the density to 1.8–2.1 g/cm3. 2. Replacing convective tempering of PAN twists in thermooxidative treatment by conductive tempering reduces the treatment time by 3–4 times.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8f3ff39f9b4adeba9dac89ca2a8298d8 https://doi.org/10.1007/s10692-006-0003-6 Zobrazit plný text záznamu Plný text ve formátu PDF