Oxidation protection is an integral part of any carbon/carbon aircraft brake friction material, since unprotected carbon oxidizes rather quickly at typical brake operating temperatures. Oxidation protection schemes are complicated by the environmental presence of numerous catalytic materials, typically alkali metal salts. P-13 antioxidant is a standard phosphoric acid based antioxidant which is used on commercial carbon/carbon friction materials. CABENIX 2400 material, a commercial carbon-carbon brake material, was used for all samples. Samples were immersion coated with antioxidant and then thermally cured. As in previous experiments multiple coatings significantly improved oxidation resistance for all formulations in both catalyzed and uncatalyzed environments. Addition of the KH2PO4 significantly improved resistance to catalytic oxidation.
Inhibition of catalytic oxidation in carbon-carbon composite friction materials
Unterbindung der katalytischen Oxidation von carbonfaserverstärktem Kohlenstoff als Reibwerkstoff
2000
2 Seiten, 1 Bild, 2 Quellen
Conference paper
English
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