Two different types of high entropy alloy thick coatings (HEAs), namely, AlCrCoFeNiTi and FeCrCoNiW_0.3+ 5 at.% C were fabricated using atmospheric plasma spray (APS) on stellite substrate and compared for their various properties. Fine spherical powder particles used for fabrication resulted in homogeneous and surface defect-free (like cracks or voids) coatings with a negligible amount of porosity. The surface roughness and dilution level of both the coatings were found to be 8.56 µm, 7.23 µm, and 3.71%, 3.55% for AlCrCoFeNiTi and FeCrCoNiW_0.3+ 5 at.% C alloy, respectively, demonstrating a strong metallurgical bonding between the coatings and substrate. A lamellar microstructure along with precipitates was observed from the microstructural investigation of both coatings. The AlCrCoFeNiTi coating comprised of two BCC phases (A2 and B2) and FeCrCoNiW_0.3+ 5 at.% coating consisted of FCC phase with Cr and W rich carbides. The microhardness of AlCrCoFeNiTi alloy coating exhibited 2.16 times higher hardness (761 ± 14 HV_0.2) and 4.28 times lower wear rate (2.8 × 10⁻⁷ mm³/ Nm) than the substrate. BCC phases, good metallurgical bonding between the matrix and substrate, and defect-free microstructure attributed to the improved wear performance of the aforementioned alloy coating.

两种不同类型的高熵合金厚涂层 (HEA)，即 AlCrCoFeNiTi 和 FeCrCoNiW _0.3 + 5 at.% C 采用大气等离子喷涂 (APS) 在司太立基体上制造，并比较了它们的各种性能。用于制造的细球形粉末颗粒产生均匀且表面无缺陷（如裂缝或空隙）的涂层，孔隙率可忽略不计。两种涂层的表面粗糙度和稀释度分别为 8.56 µm、7.23 µm，AlCrCoFeNiTi 和 FeCrCoNiW _{0.3 的表面粗糙度和稀释度分别为 3.71%、3.55%}+ 5 at.% C 合金，分别表明涂层和基材之间有很强的冶金结合。从两种涂层的微观结构研究中观察到层状微观结构和沉淀物。AlCrCoFeNiTi 涂层由两个 BCC 相（A2 和 B2）组成，FeCrCoNiW _0.3 + 5 at.% 涂层由 FCC 相和富含 Cr 和 W 的碳​​化物组成。AlCrCoFeNiTi合金涂层的显微硬度表现出比基材高2.16倍的硬度（761±14 HV _0.2）和低4.28倍的磨损率（2.8×10 ^-7 mm ³ / Nm）。BCC 相、基体和基体之间良好的冶金结合以及无缺陷的微观结构归因于上述合金涂层的磨损性能改善。