| Autor: |
Yadav, Neeti |
| Zdroj: |
Synthetic Fibres; Apr-Jun2004, Vol. 33 Issue 2, p3-6, 4p, 1 Diagram, 3 Charts |
| Abstrakt: |
This article offers background information about carbon fibres. The demand for high-performance composite materials during the mid-1960s for aeronautics and aerospace applications led to the development of strong carbon fibres. Due to the high cost associated with high-performance carbon fibres, they are currently manufactured in two varieties: strong and continuous fibres/filaments and low-quality fibres/filaments in various forms. The first type has a limited market and is primarily used in aeronautic and space industries. The second type has a lower production cost and is used in refractory and thermal insulation applications. The significant characteristics of an ideal engineering material is its strength, toughness and low weight. Conventional engineering materials, like metals and their alloys are strong and tough but not light. Some covalent materials are strong but not very tough, whereas certain plastic materials are light but lack strength and toughness. High-performance carbon fibres are elastic to failure at normal temperature which renders them creep resistance and non-susceptibility to fatigue. Long C-C molecular chains yielding very stiff fibres build carbon fibres. The trends have driven development of carbon fibres in two directions: high-strength fibres with very high tensile strength and a fairly high strain to failure and high modulus fibre with very high stiffness. |
| Databáze: |
Supplemental Index |
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