1998 / Solid Freeform Fabrication Proceedings
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Author J. Maxwell (a), K. Larsson (a), M. Boman (a), P. Hooge (b), Kirk Williams (b), P. Coane (b), (a) Uppsala University, (b) Louisiana Tech University
Source Solid Freeform Fabrication Proceedings, 1998, pp 529-536
Abstract High field-density microsolenoids from 100 to 500 microns in diameter were prototyped using both low and high pressure laser chemical vapor deposition. Tungsten lines were drawn about coated Co-Fe-Si-B magnetic cores from a mixture of WF6 and hydrogen, yielding prototype microelectromagnets. Free-standing tungsten carbide coils and single crystal tungsten needles were deposited at high deposition rates from a variety of WF6-H2-He mixtures. The WF6-H2-He system was studied to obtain desired crystal morphologies. The convective cooling and diffusion of Xe vs. He was explored. Carbon fibers and helices were also grown at pressures up to 3000 mbar from ethylene. Peak temperatures during the growth process were monitored continuously with a simple apparatus which will be described. The future of high-pressure LCVD for micro-scale rapid prototyping of metals appears to be promising. Keywords: Laser Deposition, Tungsten, Carbon, Direct-writing, Freeform Growth, Microsolenoid, Microelectromagnet, Microcoi ls, Microsprings, Probes (Auth abstract) [References: 8]
Solid Freeform Fabrication Proceedings can be obtained from: The Solid Freeform Fabrication Symposium
or contact:
The University of Texas at Austin
Laboratory for Freeform Fabrication / Texas Materials Institute
Mechanical Engineering Dept.
c/o The Solid Freeform Fabrication Symposium
MC C2200
Austin, TX 78712-1063 USA
512-471-3026; 512-471-7681 FX; Email: sffsymp@uts.cc.utexas.edu