Three-dimensional microscale flow of polymer coatings on glass during indentation
| Autor: | Lena R. Bartell, M. L. Sorensen, J. R. Matthews, Neil Y. C. Lin, G. S. Glaesemann, M. E. DeRosa, J. L. Lyon, M. J. Lockhart, D. A. Clark, Itai Cohen |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Direct observation Modulus 02 engineering and technology Slip (materials science) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Silica nanoparticles Indentation Polymer coating von Mises yield criterion General Materials Science Composite material 0210 nano-technology Microscale chemistry |
| Zdroj: | MRS Communications. 7:896-903 |
| ISSN: | 2159-6867 2159-6859 |
| Popis: | We present an indentation-scope that interfaces with confocal microscopy, enabling direct observation of the three-dimensional (3D) microstructural response of coatings on substrates. Using this method, we compared microns-thick polymer coatings on glass with and without silica nanoparticle filler. Bulk force data confirmed the >30% modulus difference, while microstructural data further revealed slip at the glass-coating interface. Filled coatings slipped more and about two times faster, as reflected in 3D displacement and von Mises strain fields. Overall, these data indicate that silica-doping of coatings can dramatically alter adhesion. Moreover, this method compliments existing theoretical and modeling approaches for studying indentation in layered systems. |
| Databáze: | OpenAIRE |
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