Production of substantially spherical metal powders
First Claim
1. A method for producing a substantially spherical metal or metal alloy powder comprising:
- providing a particulate source metal including a primary particulate and having an average starting particle size, wherein the particulate source metal consists essentially of one or more of a metal, a metal alloy, a hydride thereof, or an oxide thereof;
mixing the particulate source metal with a binder and an optional solvent to form a slurry;
granulating the slurry to form substantially spherical granules, wherein each granule comprises an agglomeration of particulate source metal;
debinding the granules at a debinding temperature to reduce a binder content of the granules forming debinded granules;
at least partially sintering the debinded granules at a sintering temperature such that particles within each granule fuse together to form partially or fully sintered granules;
recovering the sintered granules to form the substantially spherical metal or metal alloy powder.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for producing a substantially spherical metal powder is described. A particulate source metal includes a primary particulate and has an average starting particle size. The particulate source metal is optionally ball milled and mixed with a binder in a solvent to form a slurry. The slurry is granulated to form substantially spherical granules, wherein each granule comprises an agglomeration of particulate source metal in the binder. The granules are debinded at a debinding temperature to remove the binder from the granules forming debinded granules. The debinded granules are at least partially sintered at a sintering temperature such that particles within each granule fuse together to form partially or fully sintered solid granules. The granules can then be optionally recovered to form a substantially spherical metal powder.
53 Citations
20 Claims
-
1. A method for producing a substantially spherical metal or metal alloy powder comprising:
-
providing a particulate source metal including a primary particulate and having an average starting particle size, wherein the particulate source metal consists essentially of one or more of a metal, a metal alloy, a hydride thereof, or an oxide thereof; mixing the particulate source metal with a binder and an optional solvent to form a slurry; granulating the slurry to form substantially spherical granules, wherein each granule comprises an agglomeration of particulate source metal; debinding the granules at a debinding temperature to reduce a binder content of the granules forming debinded granules; at least partially sintering the debinded granules at a sintering temperature such that particles within each granule fuse together to form partially or fully sintered granules; recovering the sintered granules to form the substantially spherical metal or metal alloy powder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification