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
Life of this patent
Estimating the term…
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.
Claims17
A cerium-containing nano-coating composition, the composition comprising:
- 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;
- wherein the diameter of each crystalline region is less than 50 nanometers.
A method for producing a composition, the method comprising:
- immersing a metal substrate in a cerium-containing aqueous bath having depositing a cerium-containing conversion coating on the substrate;
- 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.
The method of 12, further comprising preparing the substrate prior to immersion by one or more of grinding, acid treatment, and alkaline treatment.
The method of 12, wherein the diameter of each crystalline region of the phosphated nano-coating is less than 50 nanometers.
Dependencies are inferred from the claim text.