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Synthesis, Processing, and Mechanical Behavior of Nanocomposite Thin Films
Dr. Robert Cammarata
Department of Materials Science and Engineering Johns Hopkins University
A nanocomposite can be defined as a multiphase material with a characteristic microstructural length scale that is less than or of order 100 nm. This length scale can be, for example, the layer thickness in a multilayered material or the diameter of a second phase particle in a particle-reinforced composite. Thin film deposition methods can be used to produce a wide variety of nanocomposites in a highly controlled manner. Because of their nanoscale microstructure, nanocomposite thin films display unusual and often enhanced properties relative to bulk materials. As an example, nanocomposites can possess unique mechanical behaviors that have potential technological applications in the areas of structural materials and hard coatings. The synthesis and processing of nanocomposite thin films by novel sputtering and electrochemical deposition techniques will be presented. The mechanical behavior of these materials, as investigated using nanoindentation, internal fraction, and fati gue testing methods, will also be discussed. Finally, a new method for assembling nanowires in solution to produce patterned strcutures will be presented.
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