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.
Claims9
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:
- orthophosphoric acid, aluminum hydroxide,
- demineralized water, a wetting additive,
- colloidal silica, silicon hexaboride, and boron.
A method of providing an anti-oxidant coating to a carbon article shaped as a brake disc, the method comprising the steps of:
- 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.
Dependencies are inferred from the claim text.