Collaborative Research: Design, Assembly, and Characterization of Metal-Ceramic Composite Reentrant Structures

本研究的目的是设计，组装和表征金属，负泊松比（NPR）支架与整体压电陶瓷节点通过直接写入的胶体凝胶基墨水。 在直接书写中，能够保持其挤出形状的墨水细丝被逐层沉积以构建所需的结构。 压电NPR支架将产生非线性机电响应，这将导致一个强大的，高度可变形的结构。 研究的挑战包括设计，印刷和金属和陶瓷元件在一个复杂的结构和设备的机电性能的表征共烧结。 科学上，这项研究将导致定向致动/传感设备，使利用最先进的直写制造和新颖的结构设计。 广泛的冲击应用包括动态过滤、生物医学设备、传感器和执行器。 研究生和本科生将获得从胶体化学到机电表征的教育。

The objective of this research is to design, assemble, and characterize a metallic, negative Poisson's ratio (NPR) scaffold with integral piezoelectric ceramic nodes by direct writing of colloidal gel based inks. In direct writing, an ink filament capable of maintaining its extruded shape is deposited layer-by-layer to build up the desired structure. The piezoelectric NPR scaffolds will generate a nonlinear electromechanical response that will lead to a robust, highly deformable structure. The research challenges include design, printing and co-sintering of metallic and ceramic elements in a complex structure and characterization of the electromechanical properties of the device. Scientifically, this research will lead to directional actuating/sensing devices enabled by the utilization of cutting edge direct write manufacturing and novel structural design. Broad impact applications include dynamic filtration, biomedical devices, sensors, and actuators. Graduate and undergraduate students will gain education ranging from colloidal chemistry to electromechanical characterization.