[en] ZrC coatings by chemical vapor deposition were applied to particles of ThO₂, UO₂ and Al₂O₃ at 1623-1873 K. The feed gas mixture consisted of ZrBr₄, CH₄, H₂ and Ar. The results were compared with the calculated chemical equilibria in the Zr-C-H-Br system. It was shown that the weight and composition of the deposit can be calculated by thermochemical analysis after correcting the methane flow rate for a pyrolysis efficiency. Predominant reaction presumably occurring were derived by a mass balance consideration on the calculated equilibrium species. A simplified model of the ZrC deposition was proposed. (orig.)