Molecular dynamics simulation of TiN (001) thin films under indentation

Tao Fu, Xianghe Peng, Yinbo Zhao, Rong Sun, Shayuan Weng, Chao Feng, Zhongchang Wang

    Research output: Contribution to journalArticlepeer-review

    36 Citations (Scopus)

    Abstract

    We optimize the second nearest-neighbor modified embedded atom method (2NN MEAM) potential for Ti-N system based on single-element potential of Ti and N. The potential parameters are determined by fitting cohesive energy, lattice parameters, and elastic constants of TiN with a NaCl-type structure. We also conduct MD simulation of indentation on TiN (001), aimed to gain insight into the deformation mechanism at 0 K and 300 K, and analyze in detail the microstructural evolution and bond variation. We demonstrate that the optimized potential can be applied to the Ti-N system with various phases. Moreover, we also find that dislocations and slips are generated from the contact point during indentation, yet are reluctant to migrate. In addition, hardness is found to reduce when temperature rises to room temperature owing to the enhanced migration of slips at high temperature.

    Original languageEnglish
    Pages (from-to)14078-14086
    Number of pages9
    JournalCeramics International
    Volume41
    Issue number10
    DOIs
    Publication statusPublished - 2015 Jun 12

    Keywords

    • Indentation
    • MD simulation
    • MEAM potential
    • TiN film

    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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