HIGH ENTROPY ALLOYS COATINGS: PROBLEMS AND PROSPECTS

Аннотация

High entropy alloys (HEAs) have been widely applied as a new generation of materials in materials science and coating technologies in recent years. This article provides a comprehensive analysis of the existing problems and prospects of coatings obtained from high entropy alloys. The mechanical, thermal, and corrosion resistance properties of HEAs, as well as the challenges encountered during their preparation and on their surfaces, are discussed in detail. The article addresses the technological problems in the application of HEAs, new methods for improving coating quality, and prospects for future developments. The research findings highlight the potential for effectively utilizing high entropy alloys in various industries. Keywords: High entropy alloys, coatings, materials science, corrosion, mechanical properties, nanostructures, technological problems. High entropy alloys (HEAs) are alloys composed of several elements present in high concentrations, distinguishing them from conventional alloys due to their unique physical and chemical properties. As multi-component systems, HEAs possess high mechanical strength, heat resistance, corrosion resistance, and other high-performance characteristics, making them promising materials for various industrial applications. The development of these alloys is bringing revolutionary changes in the field of materials science. However, several technological challenges remain associated with HEAs. Issues such as their production, optimization of mechanical and thermal properties, and ensuring resistance to corrosion and other external influences are still not fully resolved. Particularly, coatings made from HEAs are receiving significant attention in both industrial and scientific research circles because they provide surfaces with high durability and long-term performance. At the same time, the prospects for the development of these materials and new research directions are generating great interest in the fields of materials science and technology [3, 183-202]. High entropy alloys (HEAs) are alloys made from several metal elements, with each component's proportion being equal or relatively high. These 5 ACADEMIC RESEARCH IN MODERN SCIENCE International scientific-online conference materials typically include five or more primary components, and their composition is optimized to achieve the maximum value of entropy. The main feature of HEAs is their high entropy level, which alters their physical, chemical, and mechanical properties. Key Characteristics of HEAs: Characteristic Description Multi-component composition Alloys consisting of five or more metallic elements. High mechanical properties Possess high tensile strength, compression, and elongation characteristics Corrosion resistance Typically, HEAs have high corrosion resistance. Heat and cold resistance Capable of effective operation at high temperatures. HEAs are widely used in industries that require high performance and long-term operation, including aerospace, energy, and automotive industries. Additionally, the complexities in their production process are being addressed through scientific research. Although high entropy alloys (HEAs) have wide applications due to their unique physical and chemical properties, there are several challenges in their production and application. HEAs are multi-component alloys, and controlling their composition and phase structures is difficult. While HEAs can operate at high temperatures, their thermal stability depends on phase transformations, segregation, and crystallization processes, which may reduce their mechanical strength and corrosion resistance. Despite their high mechanical properties, the complex structures of HEAs make it challenging to optimize their mechanical characteristics. Some HEAs have good corrosion resistance, but other components, such as nickel-free alloys, may be susceptible to corrosion in humid environments. To enhance corrosion resistance, the need for special protective coatings or the addition of new alloying elements arises. The production technology for HEAs is still in the development stage and requires new technologies. High-temperature melting processes and special equipment increase production costs. HEAs generate significant interest in industry and science, but they face technological challenges [1, 700-704]. New approaches and optimized materials are needed to address these issues. High entropy alloys (HEAs) can also be applied as high-performance coatings due to their unique physical and chemical properties. The multi- component structure of HEAs provides advantages such as high mechanical 6 ACADEMIC RESEARCH IN MODERN SCIENCE International scientific-online conference strength, heat and cold resistance, and corrosion resistance. However, the use of HEAs as coatings also brings about several technological and production challenges. The high mechanical strength, heat and cold resistance, and corrosion resistance of HEAs make them ideal