<p>The discovery of high entropy alloys (HEAs) opened new vistas in research and development of advanced materials for aerospace, biomedical, electrical, automotive and electronic applications because of their excellent properties. HEAs have high strength with adequate ductility, high thermal stability, high wear and corrosion resistance, and good electrical properties. However, their use in some applications is undermined by some of their weaknesses like phase segregation and heterogeneous microstructure. Ceramic materials are known for their hardness, high thermal resistance, high dielectric constant and high chemical and wear resistance. So, a composite that combines HEAs and ceramics has been reported to be useful in many advanced applications where only HEAs or ceramics cannot perform creditably. This review was therefore aimed at studying the development trends of HEAs-ceramics (HECs) composites, their properties and prospective applications. In the study, it was gathered that HECs have high mechanical strength, excellent thermal stability, strong chemical stability, high phase stability, high wear resistance, and good dielectric and magnetic properties. Consequently, they are well suited for application in aerospace components like the nozzles and compressors (requiring high thermal stability and fracture toughness), in biomedical implants and prosthesis (requiring biocompatibility and strength that approximates that of natural bone), and in energy generation and storage such as fuel cells and supercapacitors.</p>

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Characteristic Properties and Applications of Ceramics Particulates-Reinforced High Entropy Alloys for Structural Application

  • Chika Oliver Ujah

摘要

The discovery of high entropy alloys (HEAs) opened new vistas in research and development of advanced materials for aerospace, biomedical, electrical, automotive and electronic applications because of their excellent properties. HEAs have high strength with adequate ductility, high thermal stability, high wear and corrosion resistance, and good electrical properties. However, their use in some applications is undermined by some of their weaknesses like phase segregation and heterogeneous microstructure. Ceramic materials are known for their hardness, high thermal resistance, high dielectric constant and high chemical and wear resistance. So, a composite that combines HEAs and ceramics has been reported to be useful in many advanced applications where only HEAs or ceramics cannot perform creditably. This review was therefore aimed at studying the development trends of HEAs-ceramics (HECs) composites, their properties and prospective applications. In the study, it was gathered that HECs have high mechanical strength, excellent thermal stability, strong chemical stability, high phase stability, high wear resistance, and good dielectric and magnetic properties. Consequently, they are well suited for application in aerospace components like the nozzles and compressors (requiring high thermal stability and fracture toughness), in biomedical implants and prosthesis (requiring biocompatibility and strength that approximates that of natural bone), and in energy generation and storage such as fuel cells and supercapacitors.