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:
Sep. 02, 2008
Filed:
Aug. 30, 2005
Hans-michael Güther, Königstein, DE;
Jens Rosenlöcher, Augsburg, DE;
Moritz Bauer, Augsburg, DE;
Audi AG, , DE;
Abstract
Carbon-ceramic brake discs, the remaining porosity in which, after infiltration with a carbide-forming element and reaction of this element with at least part of the carbon in the preliminary body of the carbon-ceramic brake disc to form carbides, is at least partly filled with particles whose average diameter is in the range from 0.5 nm to 20 nm, and a process for producing carbon-ceramic brake discs with reduced porosity, wherein carbon-ceramic brake discs are treated with a solution of organic compounds of boron, zirconium, titanium, silicon or aluminum or mixtures of such compounds, the cited organic compounds being present as sols in an organic solvent, after removal from the sol bath the brake discs treated in this way are dried in an oven at a heating rate of between 30 K/h and 300 K/h under air or protective gas and are then tempered at a final temperature of between 350° C. and 800° C. for between 20 minutes and 120 minutes