Dynamic dehydriding of refractory metal powders
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United States of America Patent
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Aug 21, 2012
Grant Date -
Mar 11, 2010
app pub date -
Sep 9, 2008
filing date -
Sep 9, 2008
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Abstract
Refractory metal powders are dehydrided in a device which includes a preheat chamber for retaining the metal powder fully heated in a hot zone to allow diffusion of hydrogen out of the powder. The powder is cooled in a cooling chamber for a residence time sufficiently short to prevent re-absorption of the hydrogen by the powder. The powder is consolidated by impact on a substrate at the exit of the cooling chamber to build a deposit in solid dense form on the substrate.
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