Faculty of Engineering and Natural Sciences
Novel Ceramic Fabrication for Complex 3D Designs
John W. Halloran
Department of Materials Science and Engineering
The University of Michigan, Ann Arbor, MI. 48109
I will discuss several powder processing methods used to fabricate ceramics with complex designs, from a single material or for multiple materials. Examples are designs with small features inside the object, objects with features from different materials, and features intended for toughening. The methods involve powder filled thermoplastics, used for microfabrication by coextrusion or for thermoplastic green machining and assembly. I will also discuss free form fabrication by stereolithography, using computer-controlled photo polymerization of suspensions, and by gel casting in free form fabricated lost molds. Finally, I will present a dry powder deposition method for multimaterial dielectrics. Materials and applications will be drawn from thermoelastic, dielectric, bioceramic, and structural ceramics, with emphasis on electromagnetic dielectric composites for antenna substrates and microwave filters.
March 31st, 2006, 14:30, FENS G032