L. Tuchinskiy, Material & Electrochemical Research (MER) Corporation, Tucson, AZ

Summary:

An innovative processing technique allows production of many materials - metals, ceramics, intermetallics and composites - with a porous microstructure that mimics that of lotus, wood and other plants. These materials are penetrated by a multitude of microchannels ranging from micrometers to millimeters in diameter. The technique includes extrusion of plasticized mixtures of metal, ceramic or polymer powders with organic binder. The microchannels can occupy from several percent to ninety percent of the material volume. All microchannels are oriented in one, two or three directions. The materials have low density, high specific strength and rigidity, highly developed inner surface area and low hydraulic resistance, controlled electrical and thermal conductivity in different directions, and enhanced vibration damping and sound absorbance. Such a combination of properties makes possible their multifunctional use, for example, as lightweight structural panels that, at the same time, work as compact heat exchangers, heat sinks, heat pipes, catalyst carriers, filters, vents, etc.