Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 1, 2007
Patent Application Number
10741034
Date Filed
December 19, 2003
Patent Primary Examiner
Patent abstract
The invention provides hard, ductile coatings comprising a ductile bonding layer of zirconium or titanium alloyed with a precious metal and a hard, surface layer comprising at least one compound selected from the group consisting of zirconium nitride, titanium nitride, zirconium carbide and titanium carbide and a precious metal segregated into the grain boundaries. The present invention also provides hard ductile multilayer coatings comprised of alternating ductile metal and hard nitride or carbide layers. The invention also includes methods to manufacture nitride or carbide coatings with ductile precious metal grain boundaries. The coatings provide an erosion resistant coating to surfaces to which they are applied.
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