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US 8,518,358 B2Granted
High purity and free flowing metal oxides powder
AssigneeSulzer Metco (US), Inc.
InventorsLiangde Xie, Mitchell Dorfman, Ashish Patel, Michael Mueller
Life of this patent
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Abstract
A metal oxide powder includes a powder feed material structured and arranged to form molten droplets when melted in a plasma stream. The molten droplets are structured and arranged to form frozen spherical droplets under free-fall conditions such that said molten droplets have ample time for complete in-flight solidification before reaching a collection chamber.
Claims22
A metal oxide thermal spray powder comprising:
- a powder feed material structured and arranged to form molten droplets when melted in a plasma stream;
- and
- said molten droplets being structured and arranged to form frozen spherical droplets under free-fall conditions such that said molten droplets have ample time for complete in-flight solidification before reaching a collection chamber,
- wherein said frozen spherical droplets have higher density and purity levels than the powder feed material, and
- wherein a particle size of the collected frozen spherical droplets is between about 5 μm and 150 μm.
2 more elements
A metal oxide thermal spray powder comprising:
- a yttria powder feed material structured and arranged to form molten droplets when melted in a plasma stream;
- and
- said molten droplets being structured and arranged to form frozen spherical yttria droplets under free-fall conditions such that said molten droplets have ample time for complete in-flight solidification before reaching a collection chamber,
- wherein said frozen spherical yttria droplets have higher density and purity levels than the yttria powder feed material, and
- wherein a particle size of the collected frozen spherical droplets is between about 5 μm and 150 μm.
2 more elements
A metal oxide thermal spray powder comprising:
- a yttria powder feed material structured and arranged to form molten droplets when melted in a plasma stream;
- and
- said molten droplets being structured and arranged to form frozen spherical yttria droplets under free-fall conditions such that said molten droplets have ample time for complete in-flight solidification before reaching a collection chamber,
- wherein a particle size of the collected frozen spherical yttria droplets is between about 5 μm and 150 μm.
1 more element
A metal oxide powder comprising:
- a powder feed material structured and arranged to form molten droplets when melted in a plasma stream;
- said molten droplets being structured and arranged to form frozen spherical droplets under free-fall conditions such that said molten droplets have ample time for complete in-flight solidification before reaching a collection chamber;
- said frozen spherical droplets have higher density and purity levels than the powder feed material;
- and
- a particle size of the collected frozen spherical droplets being between about 5 μm and 150 μm,
- wherein the frozen spherical droplets have a purity of higher than 99% by weight, an apparent density of higher than about 1.5 g/cc, and a flowability of less than about 60 s/50 g.
3 more elements
Dependencies are inferred from the claim text.