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

本研究的目的是设计、组装和表征一种金属负泊松比（NPR）支架，该支架具有完整的压电陶瓷节点，通过胶体凝胶基墨水直接书写。在直接书写中，能够保持其挤出形状的墨水丝被一层一层地沉积，以建立所需的结构。压电NPR支架将产生非线性机电响应，这将导致一个坚固的，高度可变形的结构。研究挑战包括设计，打印和共烧结金属和陶瓷元素在一个复杂的结构和表征的机电性能的设备。科学地说，这项研究将导致定向致动/传感装置，利用尖端的直接写入制造和新颖的结构设计。广泛影响的应用包括动态过滤，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特性的教育。

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.