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An Q, Reddy KM, Qian J, et al. Nucleation of amorphous shear bands at nanotwins in boron suboxide. Nat Commun. 2016;7:11001doi: 10.1038/ncomms11001.
An, Q., Reddy, K. M., Qian, J., Hemker, K. J., Chen, M. W., & Goddard, W. A. (2016). Nucleation of amorphous shear bands at nanotwins in boron suboxide. Nature communications, 711001. https://doi.org/10.1038/ncomms11001
An, Qi, et al. "Nucleation of amorphous shear bands at nanotwins in boron suboxide." Nature communications vol. 7 (2016): 11001. doi: https://doi.org/10.1038/ncomms11001
An Q, Reddy KM, Qian J, Hemker KJ, Chen MW, Goddard WA. Nucleation of amorphous shear bands at nanotwins in boron suboxide. Nat Commun. 2016 Mar 22;7:11001. doi: 10.1038/ncomms11001. PMID: 27001922; PMCID: PMC4804168.
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Nat Commun. 2016 Mar 22;7:11001. doi: 10.1038/ncomms11001.

Nucleation of amorphous shear bands at nanotwins in boron suboxide.

Nature communications

Qi An, K Madhav Reddy, Jin Qian, Kevin J Hemker, Ming-Wei Chen, William A Goddard

Affiliations

  1. Department of Chemistry, Materials and Process Simulation Center, California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA.
  2. WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
  3. Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA.

PMID: 27001922 PMCID: PMC4804168 DOI: 10.1038/ncomms11001

Abstract

The roles of grain boundaries and twin boundaries in mechanical properties are well understood for metals and alloys. However, for covalent solids, their roles in deformation response to applied stress are not established. Here we characterize the nanotwins in boron suboxide (B6O) with twin boundaries along the {0111} planes using both scanning transmission electron microscopy and quantum mechanics. Then, we use quantum mechanics to determine the deformation mechanism for perfect and twinned B6O crystals for both pure shear and biaxial shear deformations. Quantum mechanics suggests that amorphous bands nucleate preferentially at the twin boundaries in B6O because the twinned structure has a lower maximum shear strength by 7.5% compared with perfect structure. These results, which are supported by experimental observations of the coordinated existence of nanotwins and amorphous shear bands in B6O, provide a plausible atomistic explanation for the influence of nanotwins on the deformation behaviour of superhard ceramics.

References

  1. Nature. 2014 Jun 12;510(7504):250-3 - PubMed
  2. Nat Commun. 2013;4:1742 - PubMed
  3. Science. 2009 Dec 18;326(5960):1686-90 - PubMed
  4. Phys Rev Lett. 2015 Sep 4;115(10):105501 - PubMed
  5. Phys Rev B Condens Matter. 1993 Jan 1;47(1):558-561 - PubMed
  6. Nat Commun. 2012;3:1052 - PubMed
  7. Nature. 2013 Jan 17;493(7432):385-8 - PubMed
  8. Science. 2009 Apr 17;324(5925):349-52 - PubMed
  9. Science. 2009 Jan 30;323(5914):607-10 - PubMed
  10. Phys Rev B Condens Matter. 1993 May 15;47(19):12865-12873 - PubMed
  11. Nat Commun. 2014 Sep 12;5:4965 - PubMed
  12. Phys Rev Lett. 2014 Aug 29;113(9):095501 - PubMed
  13. Phys Rev B Condens Matter. 1996 Oct 15;54(16):11169-11186 - PubMed
  14. Science. 2003 Sep 5;301(5638):1357-9 - PubMed
  15. Nat Commun. 2013;4:2483 - PubMed

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