Investigation of Mechanical Properties of Mono- and Multi-layer Alumina and Ceria Films Using Finite Element Modeling and Nanoindentation Experiments
| Autor: | Desislava Guergova, Sabina Cherneva, Roumen Iankov, Dimitar Stoychev |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering chemistry.chemical_element 02 engineering and technology Electrolyte Nanoindentation 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Finite element method 0104 chemical sciences Stress (mechanics) chemistry Mechanics of Materials Aluminium General Materials Science Composite material 0210 nano-technology Multi layer |
| Zdroj: | Journal of Engineering Materials and Technology. 141 |
| ISSN: | 1528-8889 0094-4289 |
| Popis: | Important from exploitation point of view mechanical properties of single-layer, double-layer, and mixed alumina and ceria films and their stainless steel (SS) substrate were investigated by means of nanoindentation experiments. As a result, we obtained the experimental load–displacement curves and calculated the indentation hardness (HIT) and indentation modulus (EIT), by means of Oliver and Pharr approximation method. Numerical simulations of the process of nanoindentation by means of finite element method were performed as well, in order to obtain more information about the plastic properties of the investigated films. The obtained results show that the mixed Al2O3+Ce2O3 film, obtained at dominant concentration of cerium ions in the working electrolyte, has the highest indentation hardness and modulus, followed by the single Ce2O3-CeO2 film, the mixed Al2O3+Ce2O3 film, obtained at dominant concentration of aluminum ions in the working electrolyte, the double Ce2O3-CeO2/Al2O3 layer, and single Al2O3 layer. |
| Databáze: | OpenAIRE |
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