Sol-Gel Non-Stick Coating With Hard Base for Impact Resistance

The patent applies a multi-layer composite structure consisting of a metal substrate, a discontinuous hard base layer (metallic or ceramic), and a sol-gel non-stick coating. This composite structure combines the advantages of each material: the metal substrate provides form and basic strength, the discontinuous hard base layer provides adhesion enhancement and impact resistance, and the sol-gel coating provides non-stick properties. The intermediate hard base layer acts as a transition zone that improves bonding between the substrate and coating while resisting mechanical deformation.

The discontinuous hard base layer is applied beforehand to the metal substrate before the sol-gel coating is deposited. This intermediate layer serves as a cushioning layer that absorbs and distributes mechanical stresses from impacts or drilling operations, preventing stress concentration at the coating-substrate interface. The hard base layer's higher mechanical strength and toughness allow it to withstand deformation without causing the overlying non-stick coating to crack or delaminate.

The patent introduces a composite multi-layer structure with a discontinuous hard base layer between the metal substrate and sol-gel coating. This structural solution provides superior adhesion and impact resistance compared to surface treatments alone, while the discontinuous nature of the hard base layer (rather than a continuous layer) helps control manufacturing complexity by allowing simpler application processes and better stress distribution.