A super‐hard high entropy boride containing Hf, Mo, Ti, V, and W-Reference-Cited by-同舟云学术

A super‐hard high entropy boride containing Hf, Mo, Ti, V, and W

Published:2024-03-23 Issue:7 Volume:107 Page:4430-4435
ISSN:0002-7820
Container-title:Journal of the American Ceramic Society
language:en
Short-container-title:J Am Ceram Soc.

Author:

Filipovic Suzana¹²^ORCID,Obradovic Nina²,Hilmas Greg E.¹,Fahrenholtz William G.¹^ORCID,Brenner Donald W.³,Maria Jon‐Paul⁴^ORCID,Wolfe Douglas E.⁵,Zurek Eva⁶^ORCID,Campilongo Xiomara⁷,Curtarolo Stefano⁷⁸

Affiliation:

1. Department of Materials Science and Engineering Missouri University of Science and Technology Rolla Missouri USA

2. Institute of Technical Sciences of SASA Belgrade Serbia

3. Department of Materials Science and Engineering North Carolina State University Raleigh North Carolina USA

4. Department of Materials Science and Engineering The Pennsylvania State University University Park Pennsylvania USA

5. Applied Research Laboratory The Pennsylvania State University University Park Pennsylvania USA

6. Department of Chemistry State University of New York at Buffalo Buffalo New York USA

7. Center for Autonomous Materials Design Duke University Durham North Carolina USA

8. Department of Mechanical Engineering and Materials Science Duke University Durham North Carolina USA

Abstract

AbstractSuper‐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.

Publisher

Wiley

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