Multilayered cvd coated article and process for producing same

Details Multilayered cvd coated article and process for producing same Multilayered cvd coated article and process for producing same

C - Chemistry, Metallurgy

23

C

C23C 16/44 (2006.01) C23C 16/02 (2006.01) C23C 16/30 (2006.01) C23C 28/04 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2331383

The invention relates to a cemented carbide or ceramic article having a multilayered coating of a plurality of ultrathin CVD coating layers, and a process for producing same. Each of the ultrathin CVD coating layers has a thickness of approximately 200 nanometers or less. The multilayered coating ranges from approximately 50-400 layers, has excellent adherence and a smoothness and a hardness of at least approximately 40 GPa. The CVD coated article of the present invention exhibits improved coating properties of excellent smoothness, uniformity, toughness, hardness and abrasive wear resistance.

Cette invention concerne un article en carbure fritté ou en céramique qui possède un revêtement multicouches se composant de plusieurs couches de revêtement par DCPV ultrafines. Cette invention concerne également un procédé de production de cet article. Chaque couche de revêtement par DCPV ultrafine possède une épaisseur d'environ 200 nanomètres ou moins. Le revêtement multicouches comprend approximativement de 50 à 400 couches, possède une excellent adhérence et une excellent douceur, et possède également une dureté d'environ 40 GPa au moins. Cet article revêtu par DCPV possède de meilleures propriétés de revêtement en ce qu'il offre d'excellentes qualités de douceur, d'uniformité, de ténacité, de dureté et de résistance à l'usure par abrasion.

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