Carbon Article Having an Improved Primer Coating and an Improved Anti-Oxidant Coating
AssigneeMeggitt Aerospace Limited
InventorsCraig Edwards, David Callum Johnson, Andrew Sketchley
Life of this patent
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Abstract
A carbon article shaped as a brake disc, the brake disc being coated with an anti-oxidant coating obtained by applying as a primer coat a composition including orthophosphoric acid, aluminum hydroxide, demineralized water, and a wetting additive; curing the primer coat; applying as a barrier coat a composition including orthophosphoric acid, aluminum hydroxide, demineralized water, colloidal silica, silicon hexaboride, boron, and a wetting additive; and curing the barrier coat.
Claims17
A carbon article formed as a brake disc, the brake disc being coated with an anti-oxidant coating, the anti-oxidant coating, as applied, comprising:
- aluminum phosphate, wherein the aluminum phosphate is formed by reacting orthophosphoric acid with aluminum hydroxide;
- demineralized water and a wetting additive;
- and
- colloidal silica, silicon hexaboride, and boron.
A carbon article shaped as a brake disc, the brake disc being coated with an anti-oxidant coating obtained by:
- applying as a primer coat a composition comprising orthophosphoric acid, aluminum hydroxide, demineralized water, and a wetting additive;
- curing the primer coat;
- applying as a barrier coat a composition comprising orthophosphoric acid, aluminum hydroxide, demineralized water, colloidal silica, silicon hexaboride, boron, and a wetting additive;
- and
- curing the barrier coat.
A carbon anti-oxidant system, as applied, comprising:
- a primer coat composition comprising orthophosphoric acid, aluminum hydroxide, demineralized water, and a wetting additive;
- and
- a barrier coat composition comprising orthophosphoric acid, aluminum hydroxide, demineralized water, colloidal silica, silicon hexaboride, boron, and a wetting additive
A primer coat composition, comprising:
- orthophosphoric acid, aluminum hydroxide, demineralized water, and a wetting additive.
Dependencies are inferred from the claim text.