Abstract: Polyurethane-based coatings which exhibit superior erosion and heat resistance combined with antifouling and chemical resistance that are useful for protection of metal components are provided. The coatings are characterized by enhanced particle erosion resistance and enhanced heat resistance and are derived from specific multicomponent slurry compositions.

Abstract: Hexavalent chromium-free slurry formulations which are suitable in the production of inorganic overlay coating systems are described. The formulations provide superior hot corrosion and high-temperature oxidation protection for superalloy substrates. A basecoat slurry and topcoat slurry are provided. The basecoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:P higher than about 1:3 with the incorporation of pigments of either metallic particles, or metal oxide particles, or both in combination. The topcoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:P higher than about 1:3. An inorganic overlay coating formed on substrate made from the slurry formulation of present invention for hot corrosion protection on superalloy substrate against hot corrosion.

Abstract: Hexavalent chromium-free slurry formulations which are suitable in the production of ceramic overlay coating systems are described. The formulations provide superior hot corrosion and heat oxidation protection for superalloy substrates. A basecoat slurry and topcoat slurry are provided. The basecoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO4 higher than about 1:3 with the incorporation of metal oxide particles. The topcoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO4 higher than about 1:3. Both of the basecoat slurry and the topcoat slurry are hexavalent chromium-free.

Abstract: Hexavalent chromium-free slurries are provided that are capable of achieving a full cure at temperatures as low as 330-450 degrees F., thus making the coatings especially suitable for application on temperature sensitive base materials. The slurries are suitable in the production of protective coating systems formed by novel silicate-based basecoats that are sealed with novel phosphate-based topcoats. The coating systems exhibit acceptable corrosion and heat resistance and are capable of replacing traditional chromate-containing coating systems.

Abstract: A composition based on a certain chromium-free silicate-based binder is described. The composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder, zinc powder or a combination thereof. The coatings of the present invention are capable of achieving a full cure at temperatures as low as 350-450 degrees F. by the inclusion of a colloidal solution of a nano-sized ceria, thus making the coatings especially suitable for application on temperature sensitive base materials.

Abstract: Hexavalent chromium-free slurry formulations which are suitable in the production of ceramic overlay coating systems are described. The formulations provide superior hot corrosion and heat oxidation protection for superalloy substrates. A basecoat slurry and topcoat slurry are provided. The basecoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO4 higher than about 1:3 with the incorporation of metal oxide particles. The topcoat slurry includes an aluminum phosphate based aqueous solution having a molar ratio of Al:PO4 higher than about 1:3. Both of the basecoat slurry and the topcoat slurry are hexavalent chromium-free.

Abstract: Hexavalent chromium-free slurries are provided that are capable of achieving a full cure at temperatures as low as 330-450 degrees F., thus making the coatings especially suitable for application on temperature sensitive base materials. The slurries are suitable in the production of protective coating systems formed by novel silicate-based basecoats that are sealed with novel phosphate-based topcoats. The coating systems exhibit acceptable corrosion and heat resistance and are capable of replacing traditional chromate-containing coating systems.

Abstract: Polyurethane-based coatings which exhibit superior erosion and heat resistance combined with antifouling and chemical resistance that are useful for protection of metal components are provided. The coatings are characterized by enhanced particle erosion resistance and enhanced heat resistance and are derived from specific multicomponent slurry compositions.

Abstract: A composition based on a certain chromium-free silicate-based binder is described. The composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder, zinc powder or a combination thereof. The coatings of the present invention are capable of achieving a full cure at temperatures as low as 350-450 degrees F. by the inclusion of a colloidal solution of a nano-sized ceria, thus making the coatings especially suitable for application on temperature sensitive base materials.

Abstract: A high surface finish, thermally stable, multilayer slurry-based overlay system suitable for use in a severe thermal environment is disclosed. The disclosed embodiments include a basecoat layer formed from a slurry comprising ceramic pigment filled phosphate-based binder, a second layer formed from a slurry comprising metal oxide pigment or ceramic oxide pigment filled phosphate-based binder, and an optional seal coat layer formed from a phosphate-based binder substantially free of pigments.

Abstract: A novel chromate-free multi-layer coating system composed of a lithium-doped potassium silicate binder based basecoat composition that is sealed with an aluminum phosphate-based top coat composition is described. The multi-layer coating system exhibits superior corrosion and heat oxidation resistance which can replace traditional chromate-containing coating systems.

Abstract: A composition based on a certain chromium-free silicate-based binder is described. The one-part slurry composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder. The one-part slurry composition produces a corresponding coating exhibiting improved performance at a reduced coating thickness.

Abstract: An improved slurry formulation for the production of a thermal and environmental barrier coatings are provided which can withstand high temperature applications. The slurry includes a combination of a coarse ceramic powder fraction having close porosity particles and a fine ceramic powder fraction. The combination of the two powders produces a bimodal particle size distribution having a controlled amount of closed porosity that imparts desirable properties to the coating produced. The finer solid particles are interdispersed within an aqueous binder to produce a ceramic matrix with sufficient mechanical strength. The closed porosity containing coarse particles are embedded within the resultant ceramic matrix and do not disintegrate under high temperature conditions to impart a temperature resistant, non-collapsing closed porosity to the coating which can also act as an environmental barrier.

Abstract: A composition based on a certain chromium-free silicate-based binder is described. The one-part slurry composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder. The one-part slurry composition produces a corresponding coating exhibiting improved performance at a reduced coating thickness.

Abstract: A novel chromate-free multi-layer coating system composed of a lithium-doped potassium silicate binder based basecoat composition that is sealed with an aluminum phosphate-based top coat composition is described. The multi-layer coating system exhibits superior corrosion and heat oxidation resistance which can replace traditional chromate-containing coating systems.

Abstract: A composition based on a certain chromium-free silicate-based binder is described. The one-part slurry composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder. The one-part slurry composition produces a corresponding coating exhibiting improved performance at a reduced coating thickness.

Abstract: A composition based on a certain chromium-free silicate-based binder is described. The one-part slurry composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder. The one-part slurry composition produces a corresponding coating exhibiting improved performance at a reduced coating thickness.

Abstract: An improved slurry formulation for the production of a thermal and environmental barrier coatings are provided which can withstand high temperature applications. The slurry includes a combination of a coarse ceramic powder fraction having close porosity particles and a fine ceramic powder fraction. The combination of the two powders produces a bimodal particle size distribution having a controlled amount of closed porosity that imparts desirable properties to the coating produced. The finer solid particles are interdispersed within an aqueous binder to produce a ceramic matrix with sufficient mechanical strength. The closed porosity containing coarse particles are embedded within the resultant ceramic matrix and do not disintegrate under high temperature conditions to impart a temperature resistant, non-collapsing closed porosity to the coating which can also act as an environmental barrier.

Abstract: A high surface finish, thermally stable, multilayer slurry-based overlay system suitable for use in a severe thermal environment is disclosed.

Abstract: The present invention relates to aqueous slurry/solution compositions for the Chemical Mechanical Polishing/Planarization (“CMP”) of substrates. In particular, the novel slurries/solutions of the present invention contain a multifunctional activator which provides increased copper removal rate to the aqueous polishing slurry/solution while suppressing isotropic chemical etch and dishing of copper lines.