Multifunctional cerium-based nanomaterials and methods for producing the same
AssigneeThe Curators of the University of Missouri
InventorsMatthew J. O'Keefe, Carlos E. Castano Londono, William G. Fahrenholtz
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Abstract
Embodiments relate to a cerium-containing nano-coating composition, the composition including an amorphous matrix including one or more of cerium oxide, cerium hydroxide, and cerium phosphate; and crystalline regions including one or more of crystalline cerium oxide, crystalline cerium hydroxide, and crystalline cerium phosphate. The diameter of each crystalline region is less than about 50 nanometers.
Claims20
A method for producing a composition having a cerium-containing conversion coating on a substrate, the method comprising:
- immersing a metal substrate in a cerium-containing aqueous bath;
- spontaneously depositing a nano-coating on the substrate, wherein the nano-coating includes:
- an amorphous matrix including one or more of cerium oxide, cerium hydroxide, and cerium phosphate;
- and
- crystalline regions including one or more of crystalline cerium oxide and crystalline cerium hydroxide;
- and
- immersing the nano-coated substrate in a phosphate-containing solution sufficient to convert the deposited nano-coating to a phosphated nano-coating including:
- an amorphous matrix including one or more of cerium oxide, cerium hydroxide, and cerium phosphate;
- and
- crystalline regions including one or more of crystalline cerium oxide, crystalline cerium hydroxide, and crystalline cerium phosphate.
A method for producing a composition having a cerium-containing conversion coating on a substrate, the method comprising:
- immersing a metal substrate in a cerium-containing aqueous bath;
- and
- spontaneously depositing a nano-coating on the substrate, wherein the nano-coating includes:
- an amorphous matrix including one or more of cerium oxide, cerium hydroxide, and cerium phosphate;
- and
- crystalline regions including one or more of crystalline cerium oxide and crystalline cerium hydroxide.
Dependencies are inferred from the claim text.