Chemistry of inorganic compounds – Nitrogen or compound thereof – Carbon containing
Reexamination Certificate
2006-09-19
2006-09-19
Hendrickson, Stuart L. (Department: 1754)
Chemistry of inorganic compounds
Nitrogen or compound thereof
Carbon containing
Reexamination Certificate
active
07108840
ABSTRACT:
Disclosed herein is a method for economically manufacturing high quality TiC powder, TiCN powder or ultrafine nanophase TiC+Ni (Co, Al) and TiCN+Ni (Co, Al) composite powders by means of metallothermic reduction. The method comprises the steps of preparing a starting solution of titanium tetrachloride (TiCl4) in a carbon chloride, feeding the starting solution into a closed container containing molten magnesium (Mg) under inert atmosphere, vacuum-separating unreacted liquid-phase Mg and magnesium chloride (MgCl2) remaining after reduction of magnesium from the closed container, and collecting a TiC compound from the closed container.TiC powder, TiCN powder or ultrafine nanophase TiC+Ni (Co, Al) and TiCN+Ni (Co, Al) composite powders having a particle size of a few tens nm can be manufactured in a simpler manner using economically advantageous starting materials such as titanium tetrachloride and carbon chlorides.
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Kim Byoung-Kee
Lee Dong-Won
Cooper & Dunham LLP
Hendrickson Stuart L.
Korea Institute of Machinery & Materials
Raetzsch Alvin T
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