Synthetic diamond wear component and method

C - Chemistry – Metallurgy – 30 – B

Patent

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Details

C30B 29/04 (2006.01) C23C 16/27 (2006.01)

Patent

CA 2202225

A diamond film coated wear part, comprising a part, a first layer of polycrystalline diamond film grown on said part with non-{100} crystallographic faceting, a second layer of polycrystalline diamond film on said first layer, said second layer of polycrystalline diamond film having {100} crystallographic faceting, said second layer having a thickness sufficient to overgrow the roughness of said surface of said first layer with a continuous film. A method for making the diamond film coated wear part, comprises the steps of providing the part; depositing a first layer of polycrystalline diamond film on said part with non-{100} crystallographic faceting; depositing on the surface of said first layer a second layer of polycrystalline diamond film having {100} crystallographic faceting, said second layer having a thickness sufficient to overgrow the roughness of said surface of said first layer with a continuous film.

Une pièce d'usure revêtue d'un film diamanté, comprenant une pièce, une première couche de film diamanté polycristallin avec des facettes cristallographiques non-{100} que l'on fait croître sur ladite pièce, une seconde couche de film diamanté polycristallin sur ladite première couche, ladite seconde couche de film diamanté polycristallin ayant des facettes cristallographiques {100}, ladite seconde couche ayant une épaisseur suffisante pour recouvrir ladite surface de ladite première couche avec un film continu de manière à en faire disparaître la rugosité. Une méthode pour fabriquer une pièce d'usure revêtue d'un film diamanté comprend les étapes suivantes : fournir la pièce, déposer une première couche de film diamanté polycristallin avec facettes cristallographiques non-{100} sur ladite pièce; déposer à la surface de ladite première couche une seconde couche de film diamanté polycristallin ayant des facettes cristallographiques {100}, ladite seconde couche ayant une épaisseur suffisante pour recouvrir ladite surface de ladite première couche avec un film continu de manière à en faire disparaître la rugosité.

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