The diffusion coefficients of oxidation state and reduction state were calculated as 3.52 × 10−7 cm2 s−1 and 3.93 × 10−7 cm2 s−10−7
The friction coefficient of the oxidation layer increased with increasing duty cycle and the wear rate of the cast iron after MAO treatment reduced significantly.
Due to low coefficient of friction, oxidation resistance and corrosion resistance in Al-alloy melt, Cr2O3/CrN duplex coating was promising for molding die applications.
Besides being theoretically interesting due to their complicated atomic structure, the unique properties of quasicrystalline materials low electrical and thermal conductivity, unusual optical properties, low surface energy and coefficient of friction, oxidation resistance, biocompatibility and high hardness, to name a few also make them interesting for many practical purposes.
The coefficient of friction and oxidation stability of the coatings were also measured at elevated temperatures.
The properties of the coatings such as microhardness, modulus of elasticity, coefficient of friction and oxidation stability at elevated temperatures were also studied.
Coefficient n СН characterizing completeness of oxidation of the hydrocarbon part of the ligands does not exceed 30%%, i.e., the complete decomposition of the ligands does not occur in one cycle.
The microhardness, modulus of elasticity, coefficient of friction and the oxidation stability of the coatings were also studied.
Pulse voltammetric data were fit with a nonlinear least-squares fitting program to give an apparent standard rate constant (k0a) of 1.5 × 10−3 cm s−1 and an anodic transfer coefficient of 0.12 0.17 for the oxidation of the Cu(I CO complex.
Absorbance changes at 458 and 565 nm were monitored, corresponding to the greatest change of extinction coefficient upon oxidation or reduction, ∼4000 and 2000 M 1 cm–1, respectively.
