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| Abstract No.: |
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Scheduled at:
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Thursday, September 29, 2011, Saal A 11:35 AM
Young Professionals
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| Title: |
Natural and synthetic layered structures: Nacre vs plasma sprayed ceramics
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| Authors: |
Gopal Dwivedi* / Center for Thermal Spray Research, Department of Materials Science and Engineering, Stony Brook University, USA
Sanjay Sampath / Center for Thermal Spray Research, Department of Materials Science and Engineering, Stony Brook University, USA
Toshio Nakamura/ Center for Thermal Spray Research, Department of Mechanical Engineering, Stony Brook University, USA
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| Abstract: |
Layered materials present in nature exhibit several exceptional mechanical properties that have remained the subject of active research for several decades. These materials are an assemblage of alternating layers of hard ceramic platelets and thin soft polymeric materials, very similar to the brick-mortar structure. This layered architecture is responsible for making these materials tough by several orders of magnitude compared to its major constituent ceramic. Recent observations have revealed that plasma sprayed ceramic coatings exhibit characteristics similar to some of these naturally layered structures such as Nacre, except for the filler polymer which is not present in the sprayed coatings. In this study, a comparison of mechanical response of sprayed ceramics and that of nacreous materials will be presented. This will be followed by a discussion on the changes observed in mechanical properties due to polymer treatment of defect surfaces embedded in sprayed ceramics.
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