Abstract
Super-Hard (Hf,Mo,Ti,V,W)B2 Was Synthesized by Boro-Carbothermal Reduction and Densified by Spark Plasma Sintering. This Composition Was Produced for the First Time as a Single-Phase Ceramic in the Present Research. the Optimized Ceramic Had a Single Hexagonal AlB2-Type Crystalline Phase with a Grain Size of 3.8 µm and Homogeneous Distribution of the Constituent Metals. the Vickers Hardness Exhibited the Indentation Size Effect, Increasing from 27 GPa at a Load of 9.8 N to as High as 66 GPa at a Load of 0.49 N. This is the Highest Hardness Reported to Date for High Entropy Boride Ceramics.
Recommended Citation
S. Filipovic and N. Obradovic and G. E. Hilmas and W. G. Fahrenholtz and D. W. Brenner and J. P. Maria and D. E. Wolfe and E. Zurek and X. Campilongo and S. Curtarolo, "A Super-Hard High Entropy Boride Containing Hf, Mo, Ti, V, and W," Journal of the American Ceramic Society, Wiley, Jan 2024.
The definitive version is available at https://doi.org/10.1111/jace.19795
Department(s)
Materials Science and Engineering
Publication Status
Full Access
Keywords and Phrases
borides; hardness; scanning electron microscopy; spark plasma sintering
International Standard Serial Number (ISSN)
1551-2916; 0002-7820
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Wiley, All rights reserved.
Publication Date
01 Jan 2024
Comments
Office of Naval Research, Grant N00014‐21‐1‐2515