Hard coatings for mechanically and corrosively stressed elements
Patent 4731302 Issued on March 15, 1988. Estimated Expiration Date: 
October 6, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 6, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCorrosion resistant coating Multilayer coating including disordered, wear resistant boron carbon external coating Multilayer protective coating and method Coating composition and method Patent #: 4645715 InventorsAssigneeApplicationNo. 06/915848 filed on 10/06/1986US Classes:428/698, Carbide-, nitride-, or sulfide-containing layer428/446, Of silicon containing (not as silicon alloy)428/472, Refractory metal salt or oxide428/699Next to second metal-compound-containing layerExaminersPrimary: Swisher, Nancy A. B.Attorney, Agent or FirmInternational ClassesC23C 16/34 (20060101)C23C 30/00 (20060101) C23C 16/26 (20060101) C23C 28/04 (20060101) Foreign Application Priority Data1985-12-17 DDAbstractHard coatings for mechanically and corrosively stressed elements are applicable to arbitrarily chosen substrate materials. The mentioned elements can be tools, cutting inserts or bearings. Further, applications are possible in electronics and optics and also for decorative purposes. Hard coatings on the basis of carbon and boron nitride, produced by known techniques, are obtained which can be used in a wide field of application, exhibiting, besides a high hardness, maximum adhesion and good protection against wear and corrosion at high temperatures. The C and B/N coatings consist of amorphous network structures with short range orders similar to that of the hexagonal crystalline phases of carbon and boron nitride, have hydrogen concentrations between 5 atom-% and 50 atom-% and additional components consisting of metals and/or boron and or silicon and/or noble gases in the concentration range between 1 atom-% and 85 atom-%. | |
