Nanoparticle-modified carbon-ceramic brake discs

Details Nanoparticle-modified carbon-ceramic brake discs Nanoparticle-modified carbon-ceramic brake discs

2005-08-30

2008-09-02

Chen, Bret (Department: 1792)

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

C427S249400, C427S255120, C427S900000, C427S190000, C427S376300, C427S397700, C188S01800A

Reexamination Certificate

active

07419700

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

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Gadow, R. et al., “CMC Brake Disks in Serial Production—The Competition Between Cost Effectiveness and Technical Performance.” 26thAnnual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, vol. 23, Issue 4. Mar. 2008 (Abstract only).
Laden, K. et al., “Frictional characteristics of Al-SiC composite brake discs.” Tribology Letters 8 (2000) pp. 237-247.

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