Nanoscale architecture of (CrN/ZrN)/(Cr/Zr) nanocomposite coatings: Microstructure, composition, mechanical properties and first-principles calculations
| Autor: | Yoshihiko Takeda, O. V. Maksakova, Richard D. Tilley, Pawel Zukowski, Richard F. Webster, Oleksandr Viacheslavovych Bondar, B. O. Postolnyi, Marek Opielak, Alexander D. Pogrebnjak, Volodymyr Ivashchenko, Rimma E. Sakenova, V. M. Rogoz, V. M. Beresnev |
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| Rok vydání: | 2020 |
| Předmět: |
Nanocomposite
Mechanical Engineering Bilayer Metals and Alloys 02 engineering and technology engineering.material Nitride 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences 0104 chemical sciences Metal Coating Mechanics of Materials visual_art Materials Chemistry engineering visual_art.visual_art_medium Composite material 0210 nano-technology Layer (electronics) Elastic modulus |
| Zdroj: | Journal of Alloys and Compounds. 831:154808 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2020.154808 |
| Popis: | The main principles of formation of microstructure and properties of the nanostructured films consisting of periodically alternating multilayers of CrN/ZrN transition metal nitride films and Cr/Zr pure metals were investigated. First-principles calculations were carried out to give more insight in the physics of the strength enhancement of the deposited coatings. A special coating architecture, which consisted of 7 metallic and 40 nitride bilayers in each modulation period, was developed and then used. The thickness of single metallic bilayer was 16 nm, while the thickness of nitride bilayer was 25 nm. Microstructure studies showed mainly the presence of cubic CrN and ZrN with (200) and (111)/(200) preferential orientations, respectively. The analysis of the defect structure near the CrN and ZrN layer interfaces revealed the presence of dislocations, despite the small size of nanolayers and nanocrystallites, and the disorientation of the planes of nanocrystallites. The maximal hardness, reduced elastic modulus, elastic strain prior to plastic deformation and resistance to plastic deformation of the nanocomposite (CrN/ZrN)/(Cr/Zr) coatings were reached 34 GPa, 330 GPa, 0.1 GPa and 0.36 GPa, respectively, due to the multilayer-in-multilayer design and structural peculiarities of experimental coatings. |
| Databáze: | OpenAIRE |
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