Active metal brazing and characterization of brazed joints in titanium to carbon-carbon composites

[摘要] The Ti-metal/C-C composite joints were formed by reactive brazing with three commercial brazes, namely, Cu-ABA, TiCuNi, and TiCuSil. The joint microstructures were examined using optical microscopy and scanning electron microscopy Coupled with energy dispersive X-ray spectrometry. The results of the microstructure analysis indicate Solute redistribution across the joint and possible metallurgical bond formation via interdiffusion, which led to good wetting and spreading. A tube-on-plate tensile test was used to evaluate joint strength of Ti-tube/C-C composite joints. The load-carrying ability was greatest for the Cu-ABA brazejoint structures. This system appeared to have the best braze spreading which resulted in a larger braze/C-C composite bonded area compared to the other two braze materials. Also, joint load-carrying ability was found to be higher for joint structures where the fiber tows in the Outer ply of the C-C composite were aligned perpendicular to the tube axis when compared to the case where fiber tows were aligned parallel to the tube axis. (c) 2005 Elsevier B.V. All rights reserved.

[发布日期] 2005-12-05

[效力级别]  Proceedings Paper