Aluminum and silica clad refractory oxide thermal spray powder
First Claim
1. A thermal spray powder characterized by ability to produce an abradable and erosion resistant coating, consisting essentially of particles having a central core of a material selected from the group consisting of zirconium oxide, magnesium oxide, hafnium oxide, cerium oxide, yttrium oxide and combinations thereof, and aluminum and silicon dioxide homogeneously bonded to the surface of said core;
- the powder particles having a size between about 149 microns and 5 microns; and
said aluminum being present in an amount between 0.5% and 15% by weight, and said silicon dioxide being present in an amount between 0.5% and 20% by weight, based on the total of the aluminum and the core material.
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Accused Products
Abstract
A thermal spray powder comprising particles with a central core of a material selected from the group consisting of zirconium oxide, magnesium oxide, hafnium oxide, cerium oxide, yttrium oxide and combinations thereof. The core then has discrete aluminum particles and silicon dioxide homogeneously disposed in a binder deposited thereon to form the thermal spray powder which may be thermal sprayed to produce an abradable and erosion resistant coating.
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Citations
10 Claims
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1. A thermal spray powder characterized by ability to produce an abradable and erosion resistant coating, consisting essentially of particles having a central core of a material selected from the group consisting of zirconium oxide, magnesium oxide, hafnium oxide, cerium oxide, yttrium oxide and combinations thereof, and aluminum and silicon dioxide homogeneously bonded to the surface of said core;
- the powder particles having a size between about 149 microns and 5 microns; and
said aluminum being present in an amount between 0.5% and 15% by weight, and said silicon dioxide being present in an amount between 0.5% and 20% by weight, based on the total of the aluminum and the core material. - View Dependent Claims (2, 3, 4, 5)
- the powder particles having a size between about 149 microns and 5 microns; and
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6. A thermal spray powder characterized by ability to produce an abradable and erosion resistant coating, consists essentially of particles having a central core of a material selected from the group consisting of zirconium oxide, magnesium oxide, hafnium oxide, cerium oxide, yttrium oxide and combinations thereof, and discrete particles of aluminum having a size below 10 microns bonded to the surface of said core with a binder comprising a silicon dioxide derivative of ethyl silicate;
- the powder particles having a size between about 149 microns and 5 microns; and
said aluminum being present in an amount between 0.5% and 15% by weight, and said silicon dioxide being present in an amount between 0.5% and 20% by weight, based on the total of the aluminum and the core material. - View Dependent Claims (7, 8, 9)
- the powder particles having a size between about 149 microns and 5 microns; and
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10. A thermal spray powder characterized by ability to produce an abradable and erosion resistant coating, consisting essentially of particles having a magnesium zirconate core coated with a binder containing discrete particles of aluminum having a size below 10 microns, in which said spray powder particles have a size between about 149 microns and 5 microns, and said binder consisting essentially of organic binder of the water soluble type and a silicon dioxide derivative of ethyl silicate;
- said aluminum being present in an amount between 1% and 10% by weight based on the total of the aluminum and core, and said silicon dioxide being present in an amount between 1% and 10% by weight, based on the total of the aluminum and core.
Specification