Method of making a coated cemented carbide body and resulting bo

Details Method of making a coated cemented carbide body and resulting bo Method of making a coated cemented carbide body and resulting bo

1985-04-02

1986-10-28

Childs, Sadie L.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

427249, 427255, 4272552, 4272553, 4272557, 4274192, 4274197, 428698, 428701, 428702, B32B 900, B32B 1900

Patent

active

046198660

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 dopant selected from the group consisting of sulfur, selenium, tellurium, phosphorous, arsenic, antimony, bismuth and mixtures thereof, 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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patent: 4018631 (1977-04-01), Hale
patent: 4019873 (1977-04-01), Reiter
patent: 4180400 (1979-12-01), Smith et al.
patent: 4219608 (1980-08-01), Nishiyama et al.
patent: 4282289 (1981-08-01), Kullander et al.

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