Quantifying adhesion energy of mechanical coatings at atomistic scale

Deqiang Yin, Xianghe Peng, Yi Qin, Jiling Feng, Zhongchang Wang

    研究成果: Article

    6 引用 (Scopus)

    抜粋

    Coatings of transition metal compounds find widespread technological applications where adhesion is known to influence or control functionality. Here, we, by first-principles calculations, propose a new way to assess adhesion in coatings and apply it to analyze the TiN coating. We find that the calculated adhesion energies of both the (1 1 1) and (0 0 1) orientations are small under no residual stress, yet increase linearly once the stress is imposed, suggesting that the residual stress is key to affecting adhesion. The strengthened adhesion is found to be attributed to the stress-induced shrinkage of neighbouring bonds, which results in stronger interactions between bonds in TiN coatings. Further finite elements simulation (FEM) based on calculated adhesion energy reproduces well the initial cracking process observed in nano-indentation experiments, thereby validating the application of this approach in quantifying adhesion energy of surface coating systems.

    元の言語English
    ページ(範囲)1451-1455
    ページ数5
    ジャーナルApplied Surface Science
    258
    発行部数4
    DOI
    出版物ステータスPublished - 2011 12 1

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films

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