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Сopper – carbon nanotubes system composites produced by electrocontact sintering of powder mixtures


V.N. Pasovec – Ph.D. (Eng.), Associate Professor, The University of Civil Protection of the Ministry for Emergency Situations of the Republic of Belarus (Minsk)
V.A. Kovtun – Dr.Sc. (Eng.), Professor, The University of Civil Protection of the Ministry for Emergency Situations of the Republic of Belarus (Minsk)

The electroconducting properties of composite materials based on copper – carbon nanotubes powder systems obtained by pressing a mixture of powder components during their electrocontact sintering were investigated. The dependences of the change in the specific electrical conductivity of composites on the content of carbon nanotubes (CNT) are established. It is shown that the increase in the CNT concentration in the copper matrix is 0.03...0.1 mass. % 4...5 times reduces the electrical conductivity of composites. The anisotropy of the electric conductivity of composites with respect to the axis of compression of samples was found. The mechanism of anisotropy of electrical conductivity is considered as a result of the influence of the pressing pressure and the sintering process of a mixture of powders under strong electric current, which contributes to the orientation of tubular nanoparticles in the copper matrix.

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June 24, 2020
May 29, 2020

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