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Will high-entropy carbides and borides be enabling materials for extreme environments?

Journal Article · · International Journal of Extreme Manufacturing
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.

Research Organization:
West Virginia University, Morgantown, WV (United States)
Sponsoring Organization:
National Research Foundation (NSF); USDOE; USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Grant/Contract Number:
AR0001428
OSTI ID:
1960567
Alternate ID(s):
OSTI ID: 2422376
OSTI ID: 1957836
Journal Information:
International Journal of Extreme Manufacturing, Journal Name: International Journal of Extreme Manufacturing Journal Issue: 2 Vol. 5; ISSN 2631-8644
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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