review · Journal of Alloys and Metallurgical Systems
Metal matrix composites reinforced with high entropy alloy particles represent an emerging material class intended for demanding technological uses. Traditional metal matrix composites reinforced with ceramics often suffer from limited toughness, ductility, and workability. By contrast, high entropy alloy particles offer intrinsic ductility and hardness, along with superior wettability when combined with metallic matrices such as aluminium, copper, magnesium, titanium, and tungsten. These combinations yield improved mechanical, thermal, wear, and corrosion performance. The evaluation of these composite systems encompasses their fabrication characteristics, interfacial reactions, and the balance of functional benefits against ongoing technical challenges. Looking ahead, addressing these processing and interfacial issues will guide subsequent research into developing resilient composite materials.
Standard ceramic-reinforced metals often crack or fail under stress due to brittleness and poor bonding between components. Using high entropy alloys as reinforcements provides a tougher, more ductile alternative. Understanding how these composites perform under heat, wear, and corrosive conditions helps materials scientists design sturdier materials capable of withstanding severe operational environments in emerging technologies.
The composite systems target demanding modern technological applications, offering potential utility for materials developers and manufacturers working with aluminium, copper, magnesium, titanium, or tungsten matrices. Because the findings derive from a review synthesising property benefits, fabrication issues, and interfacial reactions, the technology appears to be at an early research and design stage rather than near commercial deployment.
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Metal matrix composites (MMCs) reinforced with high entropy alloy particulates (HEAps) are a new class of metal-matrix composites that have the promise to meet the demanding requirements of nascent technological applications. Their desirability has been predicated on their favourable combinations of toughness, strength, ductility, and improved workability, which are acknowledged limitations of ceramic-reinforced MMCs. The superior wettability obtained between the metal matrix and the HEAps reinforcement, as well as the HEAps' intrinsic ductility and hardness, have been linked to their improved properties over conventional MMCs. This review discusses the applicability of high entropy alloys as alternatives to ceramic materials for reinforcement of metal matrix composites– Al, Cu, Mg, Ti, and W. The mechanical, corrosion, wear, and thermal properties of MMCs reinforced with high entropy alloy particles (HEAps) were discussed. Their fabrication characteristics and interfacial reactions are also assessed. This report highlights the performance benefits and certain issues associated with HEAps reinforcement application in MMCs. Finally, potential future research directions in this field are suggested.
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DOI: 10.1016/j.jalmes.2024.100057
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