Russia's carbon fiber research is deepening

Russian media reported that there are several varieties of carbon fiber composite materials used by Russia in the aerospace industry, such as carbon plastic type, carbon fiber woven fabrics, and carbon fiber knitted fabrics. During the manufacturing process of parts, the internal delamination phenomenon of composite materials will occur. The heterogeneity and anisotropy of carbon fiber composites are related. In recent years, the quality of carbon fiber and fabrics produced by different companies using different processes are uneven. When it is used in composite materials for rockets and radio aerospace technologies, the users must optimize their manufacturers and production batches to ensure quality. And reliable performance.

In view of this, a total of six kinds of viscose-based carbon fiber and viscose-based carbon fiber fabrics from different origins have been studied by scientific research institutes such as the Ural Institute of Chemical Sciences in Russia, and microstructural studies have been conducted in order to accurately understand the structure and adsorption properties of carbon fibers. The data, in this way, will contribute to the quality inspection and analysis of carbon fiber composite materials, and correct implementation of calibration procedures in the parts manufacturing process, so as to minimize the defects and insufficiency of the aerospace industry's precision parts. The pyrolysis mass spectrometry, mercury porosimetry, and electron microscopy were used for the study, and the sample length was 2 to 3 mm.

Experiments have shown that the volatilizable substances in the carbon fiber pores may have some unpredictable "complexity" during the subsequent thermal processing. The adsorption-desorption process occurs during the high temperature processing of carbon fiber composite materials or carbon fiber prepregs. The quality of the finished product will be degraded. After heating and pressurization, the adsorbed material is separated from the material and accumulates on the surface area of ​​the fiber to form organic particles. This increases the probability of stress concentration and can be formed in the carbon fiber composite material. Defects or defects.