Method of forming nanograin tungsten carbide and recycling tungsten carbide
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 25, 2003
Grant Date -
N/A
app pub date -
Sep 22, 2000
filing date -
Sep 22, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Tungsten carbide is formed from a tungsten material which is preferably tungsten carbide scrap. If scrap material is used, this is oxidized and acid leached to remove impurities and any binder material. This is then dissolved in a solution of sodium hydroxide and spray dried to form a precursor compound. A carbon compound such as citric acid can be added to the solution prior to spray drying to provide a carbon source for the tungsten carbide. The powder formed from the spray dried solution is calcined and carburized to form tungsten carbide.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully