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4903 |
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Tuesday, May 10, 2016, Auditorium 4:40 PM Young Professionals Session |
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Nature inspired damage tolerant thermal spray materials and coatings |
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Gregory Smith* / Stony Brook University, USA Michael Resnick / Stony Brook University Center for Thermal Spray Research, USA Gopal Dwivedi/ Stony Brook University Center for Thermal Spray Research, USA Sanjay Sampath/ Stony Brook University Center for Thermal Spray Research, USA |
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The study of ceramic materials for functional performance roles has seen rapid expansion in the past 20 years as the range of military and civilian armor applications has grown. Ceramics offer many benefits with regards to their low density, high stiffness, extreme hardness, and thermal loading ability, but often fall short in areas of fracture toughness and the ability to extend energy dissipation. Overcoming these shortfalls has been the focus of research over this period and has seen inroads into durable ceramic usage for engineering applications, including those related to impact and armor applications. Concurrently, there has been significant interest in using bio-inspired hybrid materials concepts to impart enhanced toughness to synthetic ceramic compositions. Various deposition processes and methods have been used to produce materials that mimic the nacreous layers of an abalone shell and have been subject to intense interest in recent years as an approach in materials science research to simultaneously engineer strength and toughness. Recent work at Stony Brook Universitys Center for Thermal Spray Research has shown that polymer infiltrated thermal sprayed ceramic templates have promising nacre like behavior with meaningful strength and toughness while retaining low density. The layered deposition process of thermal spray also allows for production of multi-layer, multi-material systems, with differing architectures. In this presentation, examples of such layered materials concepts will be shown within the context of their potential for impact absorption and energy dissipation. |