Integration of High‐Conductivity Graphite Foam to Metallic Systems Using Ag‐ C u‐ T i and A g‐ C u‐ P d Braze Alloys

Graphite foams with low, medium, and high densities were joined to C u‐clad‐ M o, 430 stainless steel, titanium, and I nconel 625 using C usil‐ ABA ® and P alcusil‐5 ® . Copper‐clad‐molybdenum and steel were also joined to S i C ‐coated foam. Well‐bonded joints with partially infiltrated foam and with carbon ligaments enriched with T i formed in C usil‐ ABA joints of coated and uncoated foam. Low‐density foams showed greatest braze penetration and penetration distance decreased with increasing foam density. Foam/metal joints with P alcusil‐5 showed less penetration than C usil‐ ABA . The tension test on foam/ C u‐clad‐ M o and foam/430 stainless steel joints made using C usil‐ ABA revealed that the joints were always stronger than the foam.