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:
Oct. 03, 2023
Filed:
Sep. 04, 2020
Federal-mogul Ignition Llc, Southfield, MI (US);
Shuwei Ma, Ann Arbor, MI (US);
FEDERAL-MOGUL IGNITION LLC, Southfield, MI (US);
Abstract
An electrode material for a spark plug includes 22-46 wt % iron (Fe), inclusive, 20-40 wt % nickel (Ni), inclusive, 13-42 wt % cobalt (Co), inclusive, and one or more additional elements selected from aluminum (Al), titanium (Ti), chromium (Cr), boron (B), and niobium (Nb), wherein the electrode material has a coefficient of thermal expansion (CTE) from room temperature to 200° C. that is less than or equal to 11.0×10/° C. In another example, the electrode material includes greater than or equal to 32 wt % iron (Fe), greater than or equal to 36 wt % nickel (Ni), and one or more additional elements selected from aluminum (Al), chromium (Cr), and cobalt (Co). In advantageous embodiments, the electrode material includes greater than or equal to 22 wt % cobalt (Co). Replacing nickel with a higher percentage of cobalt can help reduce the coefficient of thermal expansion (CTE) of the electrode material.