Scholars@Duke publication: A super-hard high entropy boride containing Hf, Mo, Ti, V, and W

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

Journal articles - Journal Article

Filipovic, S; Obradovic, N; Hilmas, GE; Fahrenholtz, WG; Brenner, DW; Maria, JP; Wolfe, DE; Zurek, E; Campilongo, X; Curtarolo, S

Published in: Journal of the American Ceramic Society

July 1, 2024

Published version (DOI)

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.

Duke Scholars

Author Stefano Curtarolo Thomas Lord Department of Mechanical Engineering and Materia ...

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Published In

Journal of the American Ceramic Society

DOI

10.1111/jace.19795

EISSN

1551-2916

ISSN

0002-7820

Publication Date

July 1, 2024

Volume

107

Issue

Start / End Page

4430 / 4435

Related Subject Headings

Materials
4016 Materials engineering

Citation

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Chicago

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Filipovic, S., Obradovic, N., Hilmas, G. E., Fahrenholtz, W. G., Brenner, D. W., Maria, J. P., … Curtarolo, S. (2024). A super-hard high entropy boride containing Hf, Mo, Ti, V, and W. Journal of the American Ceramic Society, 107(7), 4430–4435. https://doi.org/10.1111/jace.19795

Filipovic, S., N. Obradovic, G. E. Hilmas, W. G. Fahrenholtz, D. W. Brenner, J. P. Maria, D. E. Wolfe, E. Zurek, X. Campilongo, and S. Curtarolo. “A super-hard high entropy boride containing Hf, Mo, Ti, V, and W.” Journal of the American Ceramic Society 107, no. 7 (July 1, 2024): 4430–35. https://doi.org/10.1111/jace.19795.

Filipovic S, Obradovic N, Hilmas GE, Fahrenholtz WG, Brenner DW, Maria JP, et al. A super-hard high entropy boride containing Hf, Mo, Ti, V, and W. Journal of the American Ceramic Society. 2024 Jul 1;107(7):4430–5.

Filipovic, S., et al. “A super-hard high entropy boride containing Hf, Mo, Ti, V, and W.” Journal of the American Ceramic Society, vol. 107, no. 7, July 2024, pp. 4430–35. Scopus, doi:10.1111/jace.19795.

Filipovic S, Obradovic N, Hilmas GE, Fahrenholtz WG, Brenner DW, Maria JP, Wolfe DE, Zurek E, Campilongo X, Curtarolo S. A super-hard high entropy boride containing Hf, Mo, Ti, V, and W. Journal of the American Ceramic Society. 2024 Jul 1;107(7):4430–4435.

Published In

Journal of the American Ceramic Society

DOI

10.1111/jace.19795

EISSN

1551-2916

ISSN

0002-7820

Publication Date

July 1, 2024

Volume

107

Issue

Start / End Page

4430 / 4435

Related Subject Headings

Materials
4016 Materials engineering