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. 06, 1992
Filed:
Aug. 01, 1990
Ronald L Andrus, Elmira, NY (US);
John F MacDowell, Penn Yan, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
For protection against oxidation or other adverse chemical deterioration, substrates such as carbon, intermetallic aluminides, and refractory metal alloys are provided with barrier coatings of an aluminoborate glass-ceramic coating having a composition, in weight percent, of about 10-55% Al.sub.2 O.sub.3, 4-40% B.sub.2 O.sub.3, up to 70% total of RO, wherein RO consists of one or more alkaline earth metal oxides selected in amounts not exceeding the indicated proportions from the group consisting of up to 70% BaO, up to 60% SrO, up to 40% CaO, and up to 25% MgO, up to 35% total of R.sub.2 O, wherein R.sub.2 O consists of one or more alkali metal oxides selected in amounts not exceeding the indicated proportion from the group consisting of up to 35% Na.sub.2 O, up to 30% K.sub.2 O, and up to 15% Li.sub.2 O, up to 25% total of metal oxides selected from the group consisting of ZnO and MnO, up to 30% of SiO.sub.2, and up to 10% F.