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:
Apr. 22, 2003
Filed:
Mar. 18, 1994
Edward Roy Stover, Akron, OH (US);
Goodrich Corporation, Charlotte, NC (US);
Abstract
This invention relates to a method of inhibiting catalyzed oxidation of carbon-carbon composites involving the steps of treating a carbon-carbon composite having pores with a liquid composition, preferably an aqueous solution, containing (a) phosphoric acid, (b) a zinc salt, and (c) an aluminum salt and heating the treated carbon-carbon composite to a temperature sufficient to form deposits within the pores. In one aspect, the deposit comprises a dispersion of aluminum-rich phosphate in zinc-rich phosphate. This solution may be used in combination with a silicon carbide barrier coating, applied by either painting or by CVD, to allow application at higher temperatures. The adherence of the barrier coating may be improved by preoxidizing the surface to increase porosity at the surface. Articles, including friction brakes, and the aqueous compositions are also part of this invention. The methods and articles show improved penetration and retention of the catalyzed oxidation inhibitors.