Abstract
The HEAs were deposited in the form of coatings by using a plasma spraying process on SS-304 substrate material. The fraction x was varied from 0 to 1(x = 0, x = 0.5, and x = 1) for Al in the HEAs and three coatings were deposited. The high-temperature oxidation test was conducted at 800 °C for 50 cycles. The Al1CrCoFeNi coating has demonstrated maximum oxidation resistance. The microhardness was found to be maximum in the case of Al1CrCoFeNi High-Entropy alloy coating (540 ± 11 HV0.3). The main reason for the enhanced performance is the solid solution strengthening in high-entropy alloys (HEAs) due to a mismatch in atomic size differences among the elements, which is caused by the substantial lattice distortion caused by the higher aluminum content.
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