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Mechanochemical synthesis of Co-C materials

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Abstract

Using mechanochemical processing, we prepared nonequilibrium Co-C solid solutions supersaturated with carbon to above 7 at %. X-ray diffraction characterization showed that the formation of fcc Co1 − x C x solid solutions was accompanied by an increase in the probability of deformation stacking faults. In Co + C mixtures containing more than 10 at % carbon, the fcc solid solution converted to the metastable cobalt carbide Co3C with an orthorhombic structure. We assessed the thermal stability of the nonequilibrium Co1 − x C x solid solutions and the heat effect of the decomposition of the cobalt carbide Co3C: −ΔH = 23 kJ/mol.

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Authors and Affiliations

  1. Moscow State University, Moscow, 119899, Russia

    V. K. Portnoi & A. V. Leonov

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  1. V. K. Portnoi
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  2. A. V. Leonov
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Correspondence to V. K. Portnoi.

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Original Russian Text © V.K. Portnoi, A.V. Leonov, 2012, published in Neorganicheskie Materialy, 2012, Vol. 48, No. 6, pp. 686–693.

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Portnoi, V.K., Leonov, A.V. Mechanochemical synthesis of Co-C materials. Inorg Mater 48, 593–600 (2012). https://doi.org/10.1134/S0020168512050147

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