The article is devoted to the comprehensive studies of high-entropy CoCuTiZrHf coating obtained by high-velocity oxygen-fuel (HVOF) in a protective atmosphere. The authors examined the metallophysical properties of the coating (using electron microscopy and X-ray diffraction analysis) in order to obtain new information about its structure, mechanical properties and phase composition. Functional properties were also determined. The authors studied the effect of mechanical activation of highly entropic material powder on the structural phase state and coating quality. The optimal technological parameters of HVOF in a protective atmosphere were determined for the formation of a highly entropic CoCuTiZrHf coating, which provides the highest adhesion and a low porosity. The authors have developed statistical process models with parameter optimisation. On the basis of complex metallophysical studies, the structure formation in highly entropic coatings was researched after HVOF in a protective atmosphere and subsequent heat treatment. Calorimetric tests of the CoCuTiZrHf alloy were performed to identify the exo-effect corresponding to the manifestation of phase transformation. The authors determined what the mechanical properties of coated steel are.

中文翻译：

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通过HVOF方法获得的CoCuTiZrHf涂层的结构和性能

本文致力于在保护性气氛中通过高速氧气燃料（HVOF）获得的高熵CoCuTiZrHf涂层的综合研究。作者检查了涂层的金属物理性能（使用电子显微镜和X射线衍射分析），以获得有关其结构，机械性能和相组成的新信息。还确定了功能性质。作者研究了高熵材料粉末的机械活化对结构相态和涂层质量的影响。确定了在保护气氛中HVOF的最佳工艺参数，以形成高熵CoCuTiZrHf涂层，该涂层具有最高的附着力和低孔隙率。作者开发了带有参数优化功能的统计过程模型。在复杂的金属物理研究的基础上，研究了在保护气氛下进行HVOF并随后进行热处理后，高熵涂层的结构形成。进行了CoCuTiZrHf合金的量热测试，以确定与相变表现相对应的外释效应。作者确定了涂层钢的机械性能。