Coatings based on interstitial alloys of transition metals have acquired a wide application range. However, interest in synthesizing coatings from new materials with requisite service properties is limited by the scarceness of data on their melting temperature. The present paper concerns calculation of the melting temperature of interstitial alloys of transition metals based on the characteristics of intermolecular interaction.
Several PVD coatings based on Ti and Zr carbides and on HSS steel were investigated. The partial pressure of the active gas (N 2 , C 2 H 2 ) and substrate temperature were varied over a wide range. The P-T-C diagrams for prediction of coating compositions, dependent on substrate temperature and gas pressure, were calculated using the thermodynamic technique for phase equilibria based on the principle of maximum entropy in an isolated thermodynamic system. The chemical composition, and electronic and atomic structure of coatings were investigated using the AES, XPS and HREELS methods.
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