Phase transitions Co–C nanocomposite at heating

L. V. Spivak^a, A. V. Sosunov^a, N. E. Shchepina<sup>b

a</sup> Perm State National Research University, Perm, Russia
^b Natural Sciences Institute, Perm University, Perm, Russia

Abstract: Differential scanning calorimetry was used to study the Co–C nanocomposite, which is an array of ultrathin carbon nanocages encapsulated cobalt nanoparticles. The activation energy of the $\alpha\to\beta$ transformation of the nanocomposite and the value of its endothermic effect have been estimated. Thermal effect is much greater than those values that correspond to the observation conditions for $\alpha\to\beta$ transformations in massive cobalt samples. The idea was put forward that transitional transformation is assumed by a non-diffusion, massive mechanism.

Keywords: phase transitions, carbon nanocages, cobalt, activation energy.

Received: 25.05.2022
Revised: 27.06.2022
Accepted: 01.07.2022

DOI: 10.21883/PJTF.2022.16.53204.19258

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