OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 25 No. 4 2023 Fig. 3. Thermal expansion coefficient during thermal cycling of components of singlecomponent coatings (a, c), multilayer coatings (b, d) and substrate (e, f) a b c d e f of the multilayer coating are in the range of 60 to 80×10-6 °C-1, while the CTE of the WC substrate phase is determined to be an average of 80×10-6 °C-1. Overall, there is a general increase in CTE for the multilayer coatings (figs. 3, b, d, e) compared to the CTE of the single-component coatings. The deformation presented here represents uniaxial strain calculated using equation ( ) , hkl in in d T d d - ε = where dhkl(T) is the interplanar distance measured at temperature T in the specimen for the diffraction reflection created by the lattice plane (hkl), and din represents the reference interplanar distance for that diffraction reflection.
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