Skip to content
6CCVD Research

A superhard incompressible carbon allotrope with deformation-induced transformation to diamond

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2024-08-30
JournaliScience
AuthorsLingyu Liu, Linyan Wang, Pan Ying, Meng Hu, Yueqing Li
InstitutionsNanjing University of Science and Technology, Yanshan University
Citations2

Abstract

Section titled ā€œAbstractā€

Recognizing the indispensability of hard materials in industrial applications, the persistent pursuit of ultra-strong and superhard materials has been a subject of extensive research. Carbon, with its versatile hybridization possibilities, emerges as a promising avenue for the creation of such materials. Herein, based on first-principles calculations, we predict an all-<i>sp</i> <sup>3</sup> hybrid orthorhombic carbon allotrope named C<sub>10</sub>. It exhibits greater incompressibility along the [010] direction than diamond, demonstrating an extreme hardness with Vickers hardness of up to 72.8 GPa. The Youngā€™s modulus of C<sub>10</sub> displays anisotropy, closely comparable to diamond along the x axis direction, while maintaining excellent mechanical stability within the range of 100 GPa. Notably, under the influence of shear force, it undergoes transformation into diamond. Functioning as a transparent semiconductor with a wide indirect band gap of 4.55 eV, C<sub>10</sub> holds promise as a potential superhard material in the semiconductor industry, especially under extreme conditions.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2016 - Three-dimensional carbon allotropes comprising phenyl rings and acetylenic chains in sp+sp2 hybrid networks
  2. 2020 - A novel two-dimensional sp-sp2-sp3 hybridized carbon nanostructure with a negative in-plane Poisson ratio and high electron mobility [Crossref]
  3. 2015 - Three-dimensional sp2-hybridized carbons consisting of orthogonal nanoribbons of graphene and net C [Crossref]
  4. 2019 - An sp-hybridized molecular carbon allotrope, cyclo [18] carbon [Crossref]
  5. 2017 - Extracting crystal chemistry from amorphous carbon structures [Crossref]
  6. 2012 - Exotic cubic carbon allotropes [Crossref]
  7. 2018 - D-carbon: Ab initio study of a novel carbon allotrope
  8. 2009 - Superhard monoclinic polymorph of carbon [Crossref]
  9. 2011 - T-carbon: a novel carbon allotrope [Crossref]
  10. 2014 - A metallic carbon allotrope with superhardness: a first-principles prediction [Crossref]

Reads Similar to This

N-type Conduction in Ultrananocrystalline Diamond/Hydrogenated Amorphous Carbon Composite Films Prepared by Coaxial Arc Plasma Deposition Using Li3PO4-Blended Graphite Targets Crystalline Tetrahedral Phases Al1-xBxPSi3 and Al1-xBxAsT3 (T = Si, Ge) Via Reactions of Al(BH4)3 and M(TH3)3 (M = P, As) Fabrication of Detonation Nanodiamonds Containing Siliconā€Vacancy Color Centers by High Temperature Annealing