Published February 21, 2024
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Twisted-layer boron nitride ceramic with high deformability and strength
Creators
- 1. Yanshan University
- 2. University of Chicago
Description
Moiré superlattices formed by twisted stacking in van der Waals materials have emerged as a new platform for exploring the physics of strongly correlated materials and other emergent phenomena. However, there remains a lack of research on the mechanical properties of twisted-layer van der Waals materials, owing to a lack of suitable strategies for making three-dimensional bulk materials. Here we report the successful synthesis of a polycrystalline boron nitride bulk ceramic with high room-temperature deformability and strength. This ceramic, synthesized from an onion-like boron nitride nanoprecursor with conventional spark plasma sintering and hot-pressing sintering, consists of interlocked laminated nanoplates in which parallel laminae are stacked with varying twist angles. The compressive strain of this bulk ceramic can reach 14% before fracture, about one order of magnitude higher compared with traditional ceramics (less than 1% in general), whereas the compressive strength is about six times that of ordinary hexagonal boron nitride layered ceramics. The exceptional mechanical properties are due to a combination of the elevated intrinsic deformability of the twisted layering in the nanoplates and the three-dimensional interlocked architecture that restricts deformation from propagating across individual nanoplates. The advent of this twisted-layer boron nitride bulk ceramic opens a gate to the fabrication of highly deformable bulk ceramics.
Data availability
The data that support the findings of this study are available within this article and its Supplementary Information. Further data are available from the corresponding authors upon request.Files
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Additional details
Identifiers
- DOI
- 10.1038/s41586-024-07036-5
- Other
- oai:uchicago.tind.io:11130
Funding
- National Natural Science Foundation of China
- 52288102
- National Natural Science Foundation of China
- 91963203
- National Natural Science Foundation of China
- 52325203
- National Natural Science Foundation of China
- 52202071
- National Natural Science Foundation of China
- 52090020
- National Natural Science Foundation of China
- U20A20238
- National Natural Science Foundation of China
- 52073245
- National Key R&D Program of China
- 2018YFA0305900
- China Postdoctoral Science Foundation
- 2023M741879
- National Funded Postdoctoral Researcher Program
- GZB20230320
- Talent research project in Hebei Province
- 2020HBQZYC003
- Natural Science Foundation of Hebei Province
- E2023203256
- Natural Science Foundation of Hebei Province
- E2022203109
- Science Research Project of Hebei Education Department
- JZX2024022
- Postdoctoral Science Preferential Funding of Hebei Province
- B2022003021
- U.S. National Science Foundation
- EAR-1361276