FLUIDIZED BED SURFACE MODIFICATION OF FINE POWDERS

Award Information
Agency:
National Science Foundation
Branch
n/a
Amount:
$64,979.00
Award Year:
1994
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
27546
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Ultramet
12173 Montague St, Pacoima, CA, 91331
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Andrew J Sherman
(818) 899-0236
Business Contact:
() -
Research Institution:
n/a
Abstract
FLUIDIZED BEDS ARE AN IDEAL TOOL FOR PRODUCING OR MODIFYING POWDER MATERIALS. UNFORTUNATELY, THE MOST DESIRABLE POWDERS FOR PRODUCING ENGINEERING MATERIALS ARE OF SUCH A FINE SIZE (<30 MICRONS, CORRESPONDING TO GELDART CLASS C POWDERS) THAT THEY ARE VERY COHESIVE AND DIFFICULT TO FLUIDIZE. SOME CLASS C POWDERS ARE FLUIDIZED BY AGGLOMERATE FORMATION, AND MANY DIELECTRIC POWDERS CAN BE FLUIDIZED IN THIS MANNER. HOWEVER, APPLICATIONS OF COATINGS OR SURFACE MODIFICATIONS AT ELEVATED TEMPERATURES CAN FORM HARD AGGLOMERATES, AN UNDESIRABLE TRAIT. OPERATING A FLUIDIZED BED ABOVE THE TRANSPORT LIMIT (FAST FLUIDIZATION) OR IN THE TURBULENT FLUIDIZATION REGION MAY ENABLE CLASS C POWDERS INCLUDING FINE POWDERS AND WHISKERS, CHOPPED FIBERS, AND THE LIKE, TO BE FLUIDIZED WITH HIGH PRODUCT YIELDS. RESEARCHERS ARE DEMONSTRATING THE FEASIBILITY OF USING A FAST-FLUIDIZED OR TURBULENT FLUIDIZED BED FOR THE APPLICATION OF COATINGS TO FINE PARTICLES AND WHISKERS. THIS WILL ALLOW THE PRODUCTION OF IMPROVED STARTING MATERIALS FOR POWDER METALLURGY, CERAMIC, AND COMPOSITE MATERIALS, AS WELL AS IMPROVED CONDUCTIVE FILLERS, REINFORCEMENTS, AND ELECTRONIC MATERIALS.

* information listed above is at the time of submission.

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