Characteristics of a thin-film high-entropy coating Fe40Ni23.5Al22.8Co12.8W0.9 obtained by radio-frequency magnetron sputtering

The article studies structure and properties of a thin-film high-entropy coating obtained by radio-frequency magnetron sputtering from the powder composition Fe40Ni235Al22.8Co12.8W0.9. It was shown that the topology of the film coating is nanocluster (68=80 nm) with an average particle size of 11.0=3.6 nm. Based on the analysis of digital profile photos, the surface roughness was estimated at Csr = 1.1 ± 0.2 nm. The influence of the annealing temperature on the electrical characteristics of the film and thermal emission coefficient is studied. It was demonstrated that at a heating temperature above 100°C, the FeNiCoAlW film has rather high heat-emitting properties (ε 8–12 µm > 0.85). The temperatures of the martensitic-austenitic transition and the temperature hysteresis were also determined.