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Journal article
Extremely hard and tough high entropy nitride ceramics
Scientific reports, v 10(1), pp 19874-19874
16 Nov 2020
PMID: 33199795
Abstract
Simultaneously hard and tough nitride ceramics open new venues for a variety of advanced applications. To produce such materials, attention is focused on the development of high-entropy ceramics, containing four or more metallic components distributed homogeneously in the metallic sublattice. While the fabrication of bulk high-entropy carbides and borides is well established, high-entropy nitrides have only been produced as thin films. Herein, we report on a newel three-step process to fabricate bulk high-entropy nitrides. The high-entropy nitride phase was obtained by exothermic combustion of mechanically-activated nanostructured metallic precursors in nitrogen and consolidated by spark plasma sintering. The fabricated bulk high-entropy nitride (Hf
0.2
Nb
0.2
Ta
0.2
Ti
0.2
Zr
0.2
)N demonstrates outstanding hardness (up to 33 GPa) and fracture toughness (up to 5.2 MPa∙m
1/2
), significantly surpassing expected values from mixture rules, as well as all other reported binary and high-entropy ceramics and can be used for super-hard coatings, structural materials, optics, and others. The obtained results illustrate the scalable method to produce bulk high-entropy nitrides with the new benchmark properties.
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Details
- Title
- Extremely hard and tough high entropy nitride ceramics
- Creators
- Dmitry Moskovskikh - National University of Science and TechnologyStepan Vorotilo - National University of Science and Technology (MISiS), Moscow, 119049, Russia.Veronika Buinevich - National University of Science and Technology (MISiS), Moscow, 119049, Russia.Alexey Sedegov - National University of Science and Technology (MISiS), Moscow, 119049, Russia.Kirill Kuskov - National University of Science and Technology (MISiS), Moscow, 119049, Russia.Alexander Khort - Royal Institute of TechnologyChristopher Shuck - Drexel UniversityMaksim Zhukovskyi - University of Notre DameAlexander Mukasyan - University of Notre Dame
- Publication Details
- Scientific reports, v 10(1), pp 19874-19874
- Publisher
- Nature Publishing Group UK
- Grant note
- ; 18-79-10215 / ;
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000595262200004
- Scopus ID
- 2-s2.0-85096047713
- Other Identifier
- 991019167460704721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary