IMECE2005 - Proceedings of IMECE2005 2005 ASME...

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Pro rnational Mechanical Engineering Co ceedings of IMECE2005 2005 ASME Inte ngress and Exposition November 5-11, 2005, Orlando, Florida USA DRAFT IMECE2005-81099 SURF MOLDING Bardt nginee , FL U A Nathan Mauntler Aerospace Engineering , Gainesville, FL USA e Engineerin University of Florida, Gainesville, FL USA chmitz d Aerospace Engineering University of Florida, Gainesville, FL USA ineer USA ace Engineering ille, FL USA tal to atur investigated. The goal was to demonstrate the reproductio n a metallic material from a master. T metallic glass material was embossed between th icon as m inte . In o betw IN n of variety of mechanical devices and systems has been restricted by the limitations of the manufacturing technology and available materials, including limits on the types and range of component geometries which can be produced. In order to realize these devices, alternate fabrication technologies suitable to these complex micro-scale and meso-scale component geometries and materials must be developed. Successful development and commercialization of this technology will enable numerous new classes of microdevices. One class of materials that enables the advances of micro- devices is amorphous metals, or bulk metallic glasses. Their unique combination of properties make amorphous metals h, high precision micro- s have strength properties f existing high strength mercially known as Vitreloy- ture yield strength of 1.90 GPa [1]. Unlike crystalline an be molded to produce mperatures near 400º C. re allows molds to be made ol steel, or even aluminum conventional thermoplastic to be modified for this costs for manufacturers. tomic structure leads to a set of amorphous metals which , high hardness, superior stic limit, and high wear resistance. These alloys have several fundamental characteristics that make them ideal for net shape molding of micro-components. Since no phase change occurs, there is relatively little shrinkage as the material cools below the glass transition temperature. This enables tight tolerance control of cast and molded features. Also, due to lack of crystallinity, bulk amorphous metal alloys tend to develop good surface finish upon vitrification, which is important because options for secondary-finishing operations are limited. Control of the viscosity of the material via temperature in its “supercooled liquid” state will allow additional flexibility in determining optimal processing parameters when molding METALLIC GLASS ACE PATTERNING BY MICRO- Jeffrey Dept. of Mechanical and Aerospace E ring Dept. of Mechanical and University of Florida, Gainesville University of Florida S Gerald Bourne Dept. of Mechanical and Aerospac g Dept. of Mechanical an Tony L. S ing W. Gregory Sawyer Dept. of Mechanical and Aerosp University of Florida, Gainesv create was TRODUCTION The steady trend towards the miniaturizatio ideal for forming high strengt components. Several of these alloy which equal or exceed those o crystalline alloys. The alloy com
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IMECE2005 - Proceedings of IMECE2005 2005 ASME...

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