The high entropy alloy (HEA) coatings are potential candidates for advanced application in the protection of steel and other traditional alloys due to their excellent physical and mechanical performance. The AlCoCrFeNi alloy series were favorably studied due to comparably low cost and stable performance. In this research, the AlCoCrFeNi coatings were prepared through surface mechanical abrasion treatment (SMAT). The process implied the comprehensive effect of cold welding and friction. The submicron-size SiC particles were added into the raw materials in different amounts. For SMAT, a high-energy ball milling method was adopted to promote the alloying of metals, disperse SiCp, and combine the powder to the carbon steel substrate. Afterward, the phase composition, microstructure of coatings, and distribution of reinforcement were detected through XRD and SEM analysis, separately, and the effect of SiC particles content on the properties of the coatings was analyzed. The results show that the addition of submicron-sized SiC significantly improved the density and stiffness of the HEA coating and diminished defects and surface roughness. Сoatings containing SiC display enhanced adhesion force and wear resistance. The proposed mechanism is that the submicron SiC particles promoted mechanical alloying of pure metal and intensified the adherence and cold welding of the coating. Especially, herein, the addition of 15 wt.% SiC granted the best comprehensive properties of the coating. Excessive SiC content led to the deterioration of coating plasticity and the growth of cracks.

中文翻译：

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亚微米 SiC 颗粒对 Alcocrfeni 高熵合金涂层性能的影响

由于其优异的物理和机械性能，高熵合金 (HEA) 涂层是钢铁和其他传统合金保护中高级应用的潜在候选者。由于相对较低的成本和稳定的性能，AlCoCrFeNi 合金系列受到了有利的研究。在这项研究中，AlCoCrFeNi 涂层是通过表面机械磨损处理 (SMAT) 制备的。该过程暗示了冷焊和摩擦的综合作用。将亚微米尺寸的 SiC 颗粒以不同的量添加到原材料中。对于 SMAT，采用高能球磨法促进金属合金化，分散 SiCp，并将粉末结合到碳钢基体上。之后，涂层的相组成、微观结构、分别通过XRD和SEM分析检测增强体的分布和分布，分析了SiC颗粒含量对涂层性能的影响。结果表明，添加亚微米尺寸的 SiC 显着提高了 HEA 涂层的密度和刚度，并减少了缺陷和表面粗糙度。含有 SiC 的涂层显示出增强的附着力和耐磨性。所提出的机制是亚微米 SiC 颗粒促进了纯金属的机械合金化并增强了涂层的粘附和冷焊。特别是，在此，添加 15 wt.% 的 SiC 赋予涂层最佳的综合性能。过多的SiC含量导致涂层塑性变差和裂纹扩展。并分析了SiC颗粒含量对涂层性能的影响。结果表明，添加亚微米尺寸的 SiC 显着提高了 HEA 涂层的密度和刚度，并减少了缺陷和表面粗糙度。含有 SiC 的涂层显示出增强的附着力和耐磨性。所提出的机制是亚微米 SiC 颗粒促进了纯金属的机械合金化并增强了涂层的粘附和冷焊。特别是，在此，添加 15 wt.% 的 SiC 赋予涂层最佳的综合性能。过多的SiC含量导致涂层塑性变差和裂纹扩展。并分析了SiC颗粒含量对涂层性能的影响。结果表明，添加亚微米尺寸的 SiC 显着提高了 HEA 涂层的密度和刚度，并减少了缺陷和表面粗糙度。含有 SiC 的涂层显示出增强的附着力和耐磨性。所提出的机制是亚微米 SiC 颗粒促进了纯金属的机械合金化并增强了涂层的粘附和冷焊。特别是，在此，添加 15 wt.% 的 SiC 赋予涂层最佳的综合性能。过多的SiC含量导致涂层塑性变差和裂纹扩展。结果表明，添加亚微米尺寸的 SiC 显着提高了 HEA 涂层的密度和刚度，并减少了缺陷和表面粗糙度。含有 SiC 的涂层显示出增强的附着力和耐磨性。所提出的机制是亚微米 SiC 颗粒促进了纯金属的机械合金化并增强了涂层的粘附和冷焊。特别是，在此，添加 15 wt.% 的 SiC 赋予涂层最佳的综合性能。过多的SiC含量导致涂层塑性变差和裂纹扩展。结果表明，添加亚微米尺寸的 SiC 显着提高了 HEA 涂层的密度和刚度，并减少了缺陷和表面粗糙度。含有 SiC 的涂层显示出增强的附着力和耐磨性。所提出的机制是亚微米 SiC 颗粒促进了纯金属的机械合金化并增强了涂层的粘附和冷焊。特别是，在此，添加 15 wt.% 的 SiC 赋予涂层最佳的综合性能。过多的SiC含量导致涂层塑性变差和裂纹扩展。所提出的机制是亚微米 SiC 颗粒促进了纯金属的机械合金化并增强了涂层的粘附和冷焊。特别是，在此，添加 15 wt.% 的 SiC 赋予涂层最佳的综合性能。过多的SiC含量导致涂层塑性变差和裂纹扩展。所提出的机制是亚微米 SiC 颗粒促进了纯金属的机械合金化并增强了涂层的粘附和冷焊。特别是，在此，添加 15 wt.% 的 SiC 赋予涂层最佳的综合性能。过多的SiC含量导致涂层塑性变差和裂纹扩展。