Özet:

This paper presents the production steps of Al covetic material, as well as a margin for the critical current in its production process along with stress-strain mechanical measurement results. As the need for energy is increasing every day, it is getting important not only its production but also its transmission in power grids. Covetic metals, one alternate to superconductors, show high electrical conductivity property for that purpose. During covetic production, a metal matrix is first melted and then mixed with Carbon Nanotubes (CNTs) before a high DC current is applied to the molten material. The role of this DC current is important in covetic material production and still under investigation. In the course of study, covetic samples have been produced for four different current values, namely 100A, 200A, 300A and 400A, applied for 10 minutes, and one sample without a DC current, all having CNT-Al mixing ratio of 1% by weight. Another sample was also produced without CNT doping for comparison purposes. Obtained results have showed that covetic material formation takes place for DC current values greater than or equal to 200A based on conductivity comparison of the samples. It is also observed that covetic materials show increased flexibility.

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