Effects of modulation periods on mechanical properties of V/VN nano-multilayers

Tao Fu, Zijian Zhang, Xianghe Peng, Shayuan Weng, Yuhan Miao, Yinbo Zhao, Shaoyun Fu, Ning Hu

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Metal/ceramic nano-multilayers, which possess the advantages of both metal and ceramics, have attracted intensive attention. In this work, the mechanical properties of V/VN nano-multilayers with different modulation periods (λs) were investigated using molecular dynamics simulations. The relationships between the microstructures and stress-strain (σ - ε) curves during in-plane tension and out-of-plane compression were explored, and the effects of λ were discussed. It shows that: (i) three kinds of V/VN nano-multilayers with different interfacial structures have different stabilities during deformation; (ii) dislocations nucleate firstly from the interfaces, propagate on {111} planes in VN layers, and deposit on the adjacent interface, and finally shift to V layers with the increase of applied strain; (iii) the nano-multilayer with larger λ has larger elastic modulus, elastic limit and lattice integrity, and strain hardening and cracks would appear in the nano-multilayers with λ > 42.90 Å.

Original languageEnglish
Pages (from-to)10295-10303
Number of pages9
JournalCeramics International
Volume45
Issue number8
DOIs
Publication statusPublished - 2019 Jun 1
Externally publishedYes

Keywords

  • Dislocation
  • Interface
  • MD simulations
  • Modulation period
  • V/VN nano-multilayers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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