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HomeSolid State PhenomenaSolid State Phenomena Vol. 258First Principles Study of Water-Based...

First Principles Study of Water-Based Self-Assembled Nanobearing Effect in CrN/TiN Multilayer Coatings

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Abstract:

Recently, we have reported on low friction CrN/TiN coatings deposited using a hybrid sputtering technique. These multilayers exhibit friction coefficients μ below 0.1 when tested in atmosphere with a relative humidity ≈ 25 %, but μ ranges between 0.6–0.8 upon decreasing the humidity below 5 %. Here we use first principle calculations to study O and H adatom energetics on TiN and CrN (001) surfaces. The diffusional barrier of H on TiN(001) is about half of the value on CrN(001) surface, while both elements are stronger bonded on CrN. Based on these results we propose a mechanism for a water-based self-assembled nanobearing.

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Periodical:

Solid State Phenomena (Volume 258)

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373-378

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.258.373

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Online since:

December 2016

Authors:

David Holec*, Jörg Paulitsch, Paul H. Mayrhofer

Keywords:

Density Functional Theory (DFT), Friction Coefficient, Multilayer Architecture, Surface Energy

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