Patent ID: 6455159
Filing Date: 2002-09-24
Classification: C04B,F16D,Y10T

Abstract:
A surface treated carbon/carbon composite or graphitic material, which is resistant to oxidation at high temperatures comprising:a fiber-reinforced carbon/carbon composite or graphitic material in contact with a phosphoric acid based penetrant salt solution which comprises the ions formed from the combination of the following: 10-80 wt % H2O, 20-70 wt % H3PO4, 0-25 wt % MnHPO4.1.6H2O, 0-30 wt % Al(H2PO4)3, 0-2 wt % B2O3, 0-10 wt % Zn3(PO4)2 and 0.1-25 wt % alkali metal mono-, di-, or tri-basic phosphate, wherein at least one of Al(H2PO4)3, MnHPO4.1.6H2O, and Zn3(PO4)2 is present.