Graphical Abstract Figure
Abstract
The current work elucidates the tribological behavior of thermally sprayed AlCoCrFeNiTi high entropy alloy coatings under various temperatures of 200 °C, 400 °C, and 600 °C. Typically, most metallic alloys demonstrate softening and an increased wear-rate when exposed to extreme temperatures under loaded weight. The atmospheric plasma sprayed high entropy alloy coating exhibited minimal wear mass loss at high temperatures. The data analysis reveals the development of a tribolayer that facilitates a reduced mass loss of 15.34% in the alloy at 600 °C. The examination of the wear scars under field emission scanning electron microscopy analysis reveals the presence of an adhesive layer, wear debris, craters, and scratches. The existence of different types of oxides on the abraded surfaces was confirmed by the results of X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The results support the effectiveness of AlCoCrFeNiTi alloy coatings in enhancing wear resistance under extreme conditions.
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