The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 2003
Filed:
Mar. 14, 2001
Hartmut Westphal, Dermbach/Rhön, DE;
Volkmar Sottke, Mülheim, DE;
Widia GmbH, Essen, DE;
Abstract
The invention relates to a composite material comprised of a coated hard metal or cermet base and to a method for the production thereof. The single layer or multilayer coating on the base contains at least one layer with a thickness ranging from 0.5 &mgr;m to 25 &mgr;m, at least one Al O phase, and at least one phase comprised of ZrO and/or HfO . According to the invention, a third finely dispersive phase comprised of an oxide, oxicarbide, oxinitride or oxicarbonitride of titanium should be included in this Al O /ZrO layer and/or HfO layer. To this end, a CVD process is used at depositing temperatures ranging from 900 ° C. to 1000 ° C. in the gas phase under pressures ran from 10 to 100000 Pa, whereby the gas phase, in addition to the gases essential for deposition, contains 0.2 to 5 mol % TiCl .