Document Type
Article
Publication Date
3-10-2022
Publication Title
Advanced Science
Issue
13
First page number:
1
Last page number:
11
Abstract
Robust superlubricity (RSL), defined by concurrent superlow friction and wear, holds great promise for reducing material and energy loss in vast industrial and technological operations. Despite recent advances, challenges remain in finding materials that exhibit RSL on macrolength and time scales and possess vigorous electrical conduction ability. Here, the discovery of RSL is reported on hydrated NbB2 films that exhibit vanishingly small coefficient of friction (0.001–0.006) and superlow wear rate (≈10−17 m3 N−1 m−1) on large length scales reaching millimeter range and prolonged time scales lasting through extensive loading durations. Moreover, the measured low resistivity (≈10−6 Ω m) of the synthesized NbB2 film indicates ample capability for electrical conduction, extending macroscale RSL to hitherto largely untapped metallic materials. Pertinent microscopic mechanisms are elucidated by deciphering the intricate load-driven chemical reactions that generate and sustain the observed superlubricating state and assessing the strong stress responses under diverse strains that produce the superior durability.
Keywords
macroscale; metallic; NbB2; superlow wear; superlubricity
Disciplines
Astrophysics and Astronomy
File Format
File Size
2800 KB
Language
English
Rights
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Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Repository Citation
Wang, J.,
Liu, C.,
Miao, K.,
Zhang, K.,
Zheng, W.,
Chen, C.
(2022).
Macroscale Robust Superlubricity on Metallic NbB2.
Advanced Science(13),
1-11.
http://dx.doi.org/10.1002/advs.202103815