Will high-entropy carbides and borides be enabling materials for extreme environments?. (9th March 2023)

• Record Type: Journal Article
• Authors: Wang, Fei; Monteverde, Frederic; Cui, Bai
• Is Part Of: International journal of extreme manufacturing. Volume 5:Number 2(2023)
• Publication Date: 2023-03-09
• Subjects: high-entropy ceramics -- high-entropy materials -- extreme environments -- ceramics; Manufacturing processes -- Periodicals; Manufacturing processes -- Technological innovations -- Periodicals; 670
• DOI: 10.1088/2631-7990/acbd6e
• Languages: English
• ISSNs: 2631-7990

Abstract

Abstract: The concept of multi-principal component has created promising opportunities for the development of novel high-entropy ceramics for extreme environments encountered in advanced turbine engines, nuclear reactors, and hypersonic vehicles, as it expands the compositional space of ceramic materials with tailored properties within a single-phase solid solution. The unique physical properties of some high-entropy carbides and borides, such as higher hardness, high-temperature strength, lower thermal conductivity, and improved irradiation resistance than the constitute ceramics, have been observed. These promising properties may be attributed to the compositional complexity, atomic-level disorder, lattice distortion, and other fundamental processes related to defect formation and phonon scattering. This manuscript serves as a critical review of the recent progress in high-entropy carbides and borides, focusing on synthesis and evaluations of their performance in extreme high-temperature, irradiation, and gaseous environments. Highlights: The concept of multi-principal component has created promising opportunities for the development of novel high-entropy ceramics for extreme environments. Some high-entropy carbides and borides show unique physical properties such as higher hardness, high-temperature strength, lower thermal conductivity, and improved irradiation resistance than the constitute ceramics. These promising properties may be attributed to the compositional complexity, atomic-level disorder, lattice distortion, and other fundamental processes related to defect formation and phonon scattering.