Joining of rough carbon-carbon composites with high joint streng

Details Joining of rough carbon-carbon composites with high joint streng Joining of rough carbon-carbon composites with high joint streng

1996-08-20

1999-10-26

Nguyen, Nam

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 8911, 156 8925, 156 8927, 156 8928, 156 8926, 156182, 228121, 403271, B29C 6500

Patent

active

059721570

ABSTRACT:
Carbon--carbon composite parts are joined with minimum surface preparation. A reactive-bonding joint interlayer having thickness greater than 1 mil is formed of fine particles of carbide-forming metallic ingredients and carbon. The joint interlayer is sandwiched between the two carbon--carbon parts to be joined and the assembly is heated under a compressive pressure to a temperature sufficient to complete the bonding reaction. No special surface preparation is required for the carbon--carbon parts due to the nature of the reactive-bonding. The mechanical properties of the joint are assured by selecting the metal-carbon ingredients so that thermal expansion mismatch is minimized. Shear strength exhibited by the resulting joints is greater than the interlaminar shear strength of the carbon--carbon composite material.

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