Mechanical properties, surface structure and morphology of carbon fibers pre-heated for liquid aluminum infiltration
Franziska S. Kachold , Rafał Kozera , Robert S. Singer , Anna Boczkowska
Abstract"To efficiently produce carbon fiber-reinforced aluminum on a large scale, we developed a special highpressure die casting process. Pre-heating of the fibers is crucial for successful infiltration. In this paper, the influence of heating carried out in industrial conditions on the mechanical properties of the fibers was investigated. Therefore, polyacrylonitrile-based high-tensile carbon fiber textiles were heated by infrared emitters in an argon-rich atmosphere to temperatures between 450 and 1400 _C. Single fiber tensile tests revealed a decrease in tensile strength and strain at fracture. Young_s modulus was not affected. Scanning electron microscopy identified cavities on the fiber surface as the reason for the decrease in mechanical properties. They were caused by the attack of atmospheric oxygen. The atomic structure of the fibers did not change at any temperature, as x-ray diffraction confirmed. Based on these data, the pre-heating for the casting process can be optimized. "
|Journal series||Journal of Materials Engineering and Performance, ISSN 1059-9495|
|Publication size in sheets||0.5|
|Keywords in English||advanced characterization, aluminum, casting and solidification, composites, heat treatment, metallic matrix|
|Score|| = 20.0, 28-11-2017, ArticleFromJournal|
= 20.0, 28-11-2017, ArticleFromJournal
|Publication indicators||: 2016 = 1.331 (2) - 2016=1.347 (5)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.