Method of forming a ceramic coating on a substrate by...

Details Method of forming a ceramic coating on a substrate by... Method of forming a ceramic coating on a substrate by...

2006-07-11

2006-07-11

McNeil, Jennifer C. (Department: 1775)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S699000, C428S701000, C428S702000, C419S001000, C419S019000, C204S298120, C204S298130

Reexamination Certificate

active

07074506

ABSTRACT:
A composite target is placed in a chamber. The target is in the form of a bar made of ceramic powder and it presents composition that is not uniform in the longitudinal direction. At least one substrate is introduced into the chamber in order to have formed thereon a ceramic coating with a composition gradient. The top face of the bar is swept by an electron beam so as to melt the bar material at its top face and form a vapor cloud in the chamber under low pressure. A bar is used that presents a plurality of superposed layers of different compositions, with the composition within each layer being uniform over the entire cross-section of the bar. Each layer of the bar comprises zirconia and at least one oxide selected from the oxides of nickel, cobalt, iron, yttrium, hafnium, cerium, lanthanum, tantalum, niobium, scandium, samarium, gadolinium, dysprosium, ytterbium, and aluminum.

REFERENCES:
patent: 3655430 (1972-04-01), Greaves
patent: 5709783 (1998-01-01), Sanchez et al.
patent: 5780171 (1998-07-01), Nissley et al.
patent: 5834070 (1998-11-01), Movchan et al.
patent: 6168833 (2001-01-01), Leushake et al.
patent: 0 799 904 (1997-10-01), None
patent: 1 158 081 (2001-11-01), None
patent: WO 99/63127 (1999-12-01), None

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