Abstract：The wettability of ten kinds of brazing fillers on C/C composite was studied with the sessile drop method.The results showed that the wettability of the brazing fillers on C/C composites was improved with the increase of the content of active elements Ti,Cr or V.In the Co-Ti and Ni-Ti brazing fillers system,the form of the element Ti had an effect on the wettability.When the element Ti existed with solid solution,it tended to react with C/C composite to improve the wettability.The elements Ti and C reacted and formed TiC compound.The active elements Cr,V distributed at the interface between C/C composite and PdNi-Cr-V-Si-B brazing filler and formed Cr23C6 phase and V2C phase respectively.When the elements Cr,V were added concurrently in the brazing filler,the former diffused to the reaction layer more strongly than the latter.
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