Diamond non-stick surface and kitchen utensils

Abstract

The invention relates to a diamond non-stick surface (2) and cookware comprising such a surface, the surface (2) comprising a metallic substrate (1) and a diamond non-stick layer. The diamond non-stick layer, in adhesion to the metallic substrate (1), comprises a metallic bonding layer (21), multiple euhedral diamond crystals (22), and a gap-filling compound (23). The diamond crystals (22) are bonded to the metallic substrate (1) via the metallic bonding layer (21). The gap-filling compound (23), made from a non-stick coating, is arranged in the gaps between adjacent diamond crystals (22) and above the metallic bonding layer (21), ensuring that the average thickness of the metallic bonding layer (21) and the gap-filling compound (23) is less than the sieving particle size of the diamond crystals (22). Figure 4f

Claims

Claims

1. Diamond non-stick surface, characterized in that it comprises: - a metal substrate (1); and - a diamond non-stick layer (2) being in adhesive relationship with the metal substrate (1), the diamond non-stick layer (2) comprising: • a metal bonding layer (21); • a plurality of diamond crystals (22) bonded to the metal substrate (1) by the metal bonding layer (21), the diamond crystals (22) having a euhedral shape; and • a gap filler (23) formed of a non-stick coating, disposed in the gaps between the adjacent diamond crystals (22) and on the metal bonding layer (21); - the sum of the first average thickness (B) of the metal bonding layer (21) and the second average thickness (G) of the gap filler (23) being less than the particle size of the diamond crystals (22).

2. A diamond non-stick surface according to claim 1, characterized in that the euhedral shape of the diamond crystals (22) is cubo-octahedral.

3. A diamond non-stick surface according to claim 2, characterized in that the metal bonding layer (21) is bonded to the diamond crystals (22) by brazing.

4. A diamond non-stick surface according to claim 3, characterized in that the particle size of the diamond crystals (22) is between 230 / 270 mesh and 20 / 25 mesh according to the mesh size according to ANSI (American National Standards Institute), and the sieving particle size of the diamond crystals (22) is between 53qm and 710pm.

5. Diamond non-stick surface according to claim 4, characterized in that - the first average thickness (B) of the metallic bonding layer (21), defined as the average thickness at an intermediate point between adjacent diamond crystals (22), ranges from 20qm to 500qm; and - the second average thickness (G) of the gap-filling product (23), defined as the average thickness at an intermediate point between adjacent diamond crystals (22), ranges from 12pm to 150qm.

6. Diamond non-stick surface according to claim 5, characterized in that - the metal bonding layer (21) contains from 5% by weight to 26% by weight of chromium; and - the metal substrate (1) is made of stainless steel.

7. A diamond non-stick surface according to claim 6, characterized in that the non-stick coating of the gap filler (23) is selected from fluorocarbon resin coatings, silicone resin coatings and sol-gel ceramic coatings.

8. A diamond non-stick surface according to claim 5, characterized in that the metallic bonding layer (21) comprises from 1.5% by weight to 20% by weight of titanium.

9. A diamond non-stick surface according to claim 8, characterized in that the non-stick coating of the gap filler (23) is one of a fluorocarbon resin, a silicone resin and a sol-gel ceramic.

10. A kitchen utensil (200), the food contact surface of which has a diamond non-stick surface (100) according to claim 1.

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