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Quantifying adhesion energy of mechanical coatings at atomistic scale

Yin, Deqiang and Peng, Xianghe and Qin, Yi and Feng, Jiling and Wang, Zhongchang (2011) Quantifying adhesion energy of mechanical coatings at atomistic scale. Applied Surface Science, 258 (4). 1451–1455. ISSN 0169-4332

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Abstract

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.

Item type: Article
ID code: 35319
Keywords: adhesion energy, TiN coatings , residual stress, adhesion, Engineering design, Surfaces, Coatings and Films
Subjects: Technology > Engineering (General). Civil engineering (General) > Engineering design
Department: Faculty of Engineering > Design, Manufacture and Engineering Management
Technology and Innovation Centre > Advanced Engineering and Manufacturing
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 28 Oct 2011 10:48
    Last modified: 05 Sep 2014 13:01
    URI: http://strathprints.strath.ac.uk/id/eprint/35319

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