The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 2005
Filed:
Jun. 12, 2002
Michael Krumpelt, Naperville, IL (US);
Terry Alan Cruse, Lisle, IL (US);
John David Carter, Bolingbrook, IL (US);
Jules L. Routbort, Hinsdale, IL (US);
Romesh Kumar, Naperville, IL (US);
Michael Krumpelt, Naperville, IL (US);
Terry Alan Cruse, Lisle, IL (US);
John David Carter, Bolingbrook, IL (US);
Jules L. Routbort, Hinsdale, IL (US);
Romesh Kumar, Naperville, IL (US);
The University of Chicago, Chicago, IL (US);
Abstract
A method for preparing compositionally graded metallic plates and compositionally graded metallic plates suitable for use as interconnects for solid oxide fuel cells are provided. The method of the invention, utilizing powder metallurgy, enables making metallic plates of generally any desired composition to meet the corrosion requirements of fuel cells and other applications, and enables making metallic plates of graded composition from one surface of the plate to the other. A powder of the desired alloy composition is obtained, then solvents, dispersants, a plasticizer and an organic binder are added to form a slip. The slip is then formed into a layer on a desired substrate that can be flat or textured. Once dried, the layer is removed from the substrate and the binder is burned out. The layer is sintered in a reducing atmosphere at a set temperature for a predefined duration specific to the materials used and the desired final properties.