A super‐hard high entropy boride containing Hf, Mo, Ti, V, and W Article Swipe
Related Concepts
Boride
Materials science
Thermodynamics
Metallurgy
Physics
Suzana Filipović
,
Nina Obradović
,
Gregory E. Hilmas
,
William G. Fahrenholtz
,
Donald W. Brenner
,
Jon‐Paul Maria
,
Douglas E. Wolfe
,
Eva Zurek
,
Xiomara Campilongo
,
Stefano Curtarolo
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1111/jace.19795
· OA: W4393118814
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1111/jace.19795
· OA: W4393118814
Super‐hard (Hf,Mo,Ti,V,W)B 2 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 AlB 2 ‐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.
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