- Author
- Lung, L. P. | Comer, J. | Forster, A. M. | Hu, H. | Floryancic, B. | Brickweg, L. | Fernando, R. H.
- Title
- Impact of Nanoparticles on the Scratch Behavior of a Polyurethane Coating.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD California Polytechnic State Univ., San Luic Obispo, CA
- Report
- ACS Symposium Series 1008; Chapter 12,
- Book or Conf
- Nanotechnology Applications in Coatings. American Chemical Society (ACS) Symposium Series 1008. Chapter 12, American Chemical Society, Washington, DC, Fernando, R. H.; Sung, L. P., Editors, 232-254 p., 2009
- Keywords
- coatings | nanotechnology | mechanical properties | fillers | morphology | mass fraction | scratch behavior
- Identifiers
- mechanical measurements; scratch testing and scratch morphology characterization; surface mechanical measurements; progressive-load scratch testing; scratch testing results for Filler A, B and C systems; comparison of the three filled systems
- Abstract
- In this paper, we report a quantitative study of the effect of nanoparticles (nano-alumina and nano-silica) on the surface mechanical properties and scratch behavior of a polyurethane coating. An instrumented indenter with a conical diamond tip is used to measure surface mechanical properties (modulus and hardness) and to perform scratch test over a wide range of scratch loads. The scratch behavior in terms of the onset of plastic-plastic transition and scratch morphology were characterized by laser scanning confocal microscopy. The scratch results were correlated to the surface mechanical properties and relevant bulk material properties to understand the overall scratch behavior of the coatings. The results indicate that the scratch behavior of the coatings depends strongly on the concentration and type ofnanoparticles.