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:
May. 29, 1990
Filed:
Mar. 07, 1989
Applicant:
Inventors:
Theodore M Besmann, Knoxville, TN (US);
Richard A Lowden, Knoxville, TN (US);
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25C / ;
U.S. Cl.
CPC ...
204279 ; 2042 / ; 2042 / ; 204291 ; 204294 ; 427113 ; 427122 ; 4271261 ; 4271262 ; 427255 ; 428113 ; 4283077 ; 501 95 ;
Abstract
An improved cathode structure for Hall-Heroult cells for the electrolytic production of aluminum metal. This cathode structure is a preform fiber base material that is infiltrated with electrically conductive titanium diboride using chemical vapor infiltration techniques. The structure exhibits good fracture toughness, and is sufficiently resistant to attack by molten aluminum. Typically, the base can be made from a mat of high purity silicon carbide fibers. Other ceramic or carbon fibers that do not degrade at temperatures below about 1000 deg. C can be used.