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    • 1997 International Solid Freeform Fabrication Symposium
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    SALDVI Optimization for the Tetramethylsilane - Silicon Carbide System

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    1997-57-Crocker.pdf (1.015Mb)
    Date
    1997
    Author
    Crocker, James E.
    Jakubenas, Kevin J.
    Harrison, Shay
    Shaw, Leon L.
    Marcus, Harris L.
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    Abstract
    Selective Area Laser Deposition Vapor Infiltration (SALDVI) ofsilicon carbide powder infiltrated with silicon carbide deposited from tetramethylsilane (TMS) was studied. The effects of deposition time, temperature, and gas precursor pressure are discussed. The discussion centers on the efforts to properly balance these parameters to produce multi-layered shapes with structural integrity, particularly for use as the matrix material for shapes containing embedded devices. This includes optimizing scan speed, deposition temperature, and gas pressure to maximize infiltration to increase density and layer to layer bonding, and minimize excessive deposition to maintain critical dimensions. Initial powder properties are also optimized to minimize bulk motion in the powder bed during deposition, which was observed and identified as a mechanism that reduces inter-layer bonding.
    Department
    Mechanical Engineering
    Subject
    SALDVI
    laser beam
    URI
    http://hdl.handle.net/2152/71419
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    • 1997 International Solid Freeform Fabrication Symposium

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