Kinetic modeling of phase separation and surface segregation in growing a-C:Ni thin films
| Autor: | Gediminas Kairaitis, Artūras Grigaliūnas, Armuntas Baginskas, Arvaidas Galdikas |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Nanocomposite chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry Substrate (electronics) 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Condensed Matter::Materials Science Adsorption chemistry Chemical physics 0103 physical sciences Materials Chemistry Surface layer Diffusion (business) Thin film 0210 nano-technology Layer (electronics) Carbon |
| Zdroj: | Surface and Coatings Technology. 352:120-127 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2018.08.012 |
| Popis: | The processes of phase separation and surface segregation which take place during two-component nanocomposite Metal:Carbon thin film growth are analyzed. The mathematical model is proposed which includes the processes of adsorption, phase separation, surface segregation, surface and bulk diffusion. The process of phase separation is described using Cahn-Hilliard equation and the process of surface segregation is described by Gibbsian segregation model. Diffusion in growing film is allowed to occur in a layer of an arbitrary thickness near the surface. The formations of metal clusters, columns or surface layer in matrixes of carbon are shown by the numerical simulations depending on thin film growth conditions. The influence of film composition and deposition temperature on film morphology is analyzed by the presented simulations. The simulation results are compared with experimental data taken from literature where C:Ni thin films were grown at different contents of Ni and substrate temperatures. The simulation results are in a good agreement with the corresponding experimental data. |
| Databáze: | OpenAIRE |
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