Atomistic Origin of Deformation Twinning in Biomineral Aragonite

Jialin Liu, Zaiwang Huang, Zhiliang Pan, Qiuming Wei, Xiaodong Li, Yue Qi

Research output: Contribution to journalArticle

  • 2 Citations

Abstract

Deformation twinning rarely occurs in mineral materials which typically show brittle fracture. Surprisingly, it has recently been observed in the biomineral aragonite phase in nacre under high rate impact loading. In this Letter, the twinning tendency and the competition between fracture and deformation twinning were revealed by first principles calculations. The ratio of the unstable stacking fault energy and the stacking fault energy in orthorhombic aragonite is hitherto the highest in a broad range of metallic and oxide materials. The underlining physics for this high ratio is the multineighbor shared ionic bonds and the unique relaxation process during sliding in the aragonite structure. Overall, the unique deformation twining along with other highly coordinated deformation mechanisms synergistically work in the hierarchical structure of nacre, leading to the remarkable strengthening and toughening of nacre upon dynamic loading, and thus protecting the mother-of-pearl from predatory attacks.

LanguageEnglish (US)
Article number105501
JournalPhysical Review Letters
Volume118
Issue number10
DOIs
StatePublished - Mar 9 2017

Profile

aragonite
twinning
stacking fault energy
attack
sliding
tendencies
minerals
physics
oxides

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Atomistic Origin of Deformation Twinning in Biomineral Aragonite. / Liu, Jialin; Huang, Zaiwang; Pan, Zhiliang; Wei, Qiuming; Li, Xiaodong; Qi, Yue.

In: Physical Review Letters, Vol. 118, No. 10, 105501, 09.03.2017.

Research output: Contribution to journalArticle

Liu J, Huang Z, Pan Z, Wei Q, Li X, Qi Y. Atomistic Origin of Deformation Twinning in Biomineral Aragonite. Physical Review Letters. 2017 Mar 9;118(10). 105501. Available from, DOI: 10.1103/PhysRevLett.118.105501
Liu, Jialin ; Huang, Zaiwang ; Pan, Zhiliang ; Wei, Qiuming ; Li, Xiaodong ; Qi, Yue. / Atomistic Origin of Deformation Twinning in Biomineral Aragonite. In: Physical Review Letters. 2017 ; Vol. 118, No. 10.
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