Layer system having at least one mixed crystal layer of a...

Details Layer system having at least one mixed crystal layer of a... Layer system having at least one mixed crystal layer of a...

C - Chemistry, Metallurgy

23

C

C23C 30/00 (2006.01) C23C 14/08 (2006.01) C23C 14/32 (2006.01)

Patent

CA 2665044

A PVD layer system for coating workpieces comprises at least one mixed crystal layer of a polyoxide with the following composition: (Me1 1-xMe2x)2O3. Me1 and Me2 are at least one of the elements Al, Cr, Fe, Li, Mg, Mn, Nb, Ti, Sb or V. The elements of Me1 and Me2 are each different. The crystal lattice of the mixed crystal layer in the PVD layer system has a corundum structure, which is characterized by at least three lines associated with the corundum structure in a spectrum of the mixed crystal layer, measured by means of X-ray diffractometry. A vacuum deposition method for the production of a mixed crystal layer of a polyoxide and accordingly coated tools and components are also disclosed.

L'invention concerne un système de couches de type PVD destiné à enduire des pièces usinées comprenant au moins une couche de cristal mixte d'un oxyde multiple avec la composition suivante : (Me11-xMe2x)2O3. Me1 et Me2 sont alors chacun au moins un des éléments Al, Cr, Fe, Li, Mg, Mn, Nb, Ti, Sb ou V. Les éléments de Me1 et Me2 sont chacun différents. Le réseau cristallin de la couche de cristal mixte dans le système de couches de type PVD présente une structure de type corindon, qui est caractérisée, dans un spectre de la couche de cristal mixte mesuré par diffractométrie des rayons X, par au moins trois des lignes attribuables à la structure de type corindon. L'invention décrit en outre un procédé de revêtement sous vide destiné à la fabrication d'une couche de cristal mixte d'un oxyde multiple ainsi que les outils et pièces détachées enduits correspondants.

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