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:
Nov. 07, 2023
Filed:
Jan. 29, 2021
Ut-battelle, Llc, Oak Ridge, TN (US);
Yong Chae Lim, Oak Ridge, TN (US);
Ji Heon Jun, Oak Ridge, TN (US);
Michael P. Brady, Oak Ridge, TN (US);
Zhili Feng, Oak Ridge, TN (US);
UT-Battelle, LLC, Oak Ridge, TN (US);
Abstract
A fastener for use in joining dissimilar materials manufactured by the process of producing the fastener with an external surface that forms an electrically insulating oxide layer when subjected to oxidation and, after manufacture and prior to use, subjecting the fastener to a pre-oxidation process to grow the desired oxide layer in situ on the external surface of the fastener. The present invention also provides a dissimilar material joint in which the pre-oxidized fastener is used to mechanically join dissimilar materials with the oxide layer electrically insulating the fastener from at least one of the dissimilar materials. The fastener may be a rivet used in friction self-piercing riveting (F-SPR). The fastener may be fabricated from an alloy capable of forming AlOor CrOby thermal oxidation. The fastener may be pre-coated with Al or Cr that functions as a seed layer to form AlOor CrO.