Method of making a coated cemented carbide body and...

Details Method of making a coated cemented carbide body and... Method of making a coated cemented carbide body and...

C - Chemistry, Metallurgy

04

B

117/85

C04B 35/00 (2006.01) C04B 41/50 (2006.01) C04B 41/87 (2006.01) C23C 30/00 (2006.01)

Patent

CA 1183411

ABSTRACT In coating cemented carbide or ceramics with thin, wear resistant layers of ceramic oxide, particularly aluminum oxide, by CVD, it has been very difficult to make sufficiently even layers and to obtain desired thickness of the layer within reasonable coating times. According to the invention an improved method utilizing a sulfur, selenium and/or tellurium dopant is now available by which a considerable increase of the growth rate of the layer as well as optimal properties regarding evenness and thickness of the layer have been obtained, making the product better suited for cutting operation.

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