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:
Jul. 03, 2001
Filed:
Oct. 22, 1998
Ursula Kayser, Immenstaad, DE;
Tilman Haug, Muehlhofen, DE;
Doris Hertel, Friedrichshafen, DE;
Kolja Rebstock, Ulm, DE;
Wolfgang Schaefer, Friedrichshafen, DE;
Helmut Knabe, Friedrichshafen, DE;
Walter Vogel, Salem-Neufrach, DE;
Dornier GmbH, Friedrichshafen, DE;
Abstract
A ceramic composite includes (a) 30 to 60% by volume of C-fibers; (b) 10 to 55% by volume of a matrix made of SiC and C, wherein the weight ratio SiC:C is in the range of between 20:1 and 2:1; (c) 5 to 40% by volume porosity that may be open or closed. A base material is formed from a)+b)+c). The ceramic composite also includes a protective system comprising at least one of (d) a lower protective layer that is situated directly on the base material consisting of one or more compounds comprising Si, C, B, O,and having a thickness between 20 and 150 &mgr;m; (e) a central protective layer that is situated above the lower protective layer consisting of at least one of transition metal borides and transition metal silicides in combination with SiC, SiO,or SiOC, and having a thickness of from 50 to 250 &mgr;m; and (f) an upper protective layer that is situated above the central protective layer consisting of one or more compounds comprising SiC, SiO,, MoSi,, Mo,Si, Mo,Si,, ZrB, ZrB,, ZrB,, Si,N,, ZrO,, Y,O,, Al,O,, mixed oxides Al,O,—SiO,, and SiOC and having a thickness of from 20 to 250 &mgr;m.