Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2007-05-01
2007-05-01
Turner, Archene (Department: 1775)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S212000, C428S332000, C428S469000, C428S472000
Reexamination Certificate
active
10741034
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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W. Janeff, “Herstellung von Metallnitriden in der Glimmentladung und einige Ihrer Eigenschaften”, Zeitschrift Fur Physik, 1955, p. 619-636, vol. 142 No. 5.
Honeywell International , Inc.
Ingrassia Fisher & Lorenz
Turner Archene
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