Diffusion barrier coating material

Details Diffusion barrier coating material Diffusion barrier coating material

C - Chemistry, Metallurgy

23

C

117/157

C23C 16/30 (2006.01) C23C 16/32 (2006.01) C23C 16/34 (2006.01) C23C 16/36 (2006.01) C23C 30/00 (2006.01)

Patent

CA 1326411

Abstract A coated body consisting of a substrate that can be decarburized during a carbide, nitride or carbonitride coat- ing process comprising a first (innermost) carbon diffusion retarding coating of MetCO, MetCON, MetON adjacent to the substrate and a second (next innermost) wear resistant coat- ing of MetC, MetN and/or MetCN, where Met is Ti, Hf, V, Zr, Si, B or other metals of subgroup 3-7 of the periodic table of the elements, or a mixture thereof. The intermediate coating has been found beneficial in order to reduce or even eliminate the formation of eta phase in the substrate.

602097

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