Metallic parts fabrication using selective inhibition of sintering (SIS)
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United States of America Patent
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Jul 10, 2007
Grant Date -
Jan 29, 2004
app pub date -
Jun 30, 2003
filing date -
Jul 23, 2002
priority date (Note) -
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Abstract
A selective inhibition of sintering (SIS) technique may be used to fabricate a three-dimensional (3-D) dense metal object from a binderless metal powder. Layers of metal powder are provided on a build tank. For each layer, regions of the layer are sinter-inhibited, e.g., by depositing a sinter-inhibiting material such as a ceramic slurry, a metal salt, or oxidizing metal particles in the powder using chemicals or a concentrated heat source. Each layer may be compacted before the next layer is provided. A final compact may then be sintered. Unwanted sintered sections may be removed from the compact at boundaries formed by the sinter-inhibited (unsintered) regions, and the object extracted.
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