A novel approach to brazing C/C composite to Ni-based superalloy using alumina interlayer
A novel approach to brazing C/C composite to Ni-based superalloy using alumina interlayer
复制标题
DOI：
10.1016/j.jeurceramsoc.2011.12.016
复制
发表时间：
2012-07
影响因子：
5.7
通讯作者：
Yuan-shou Shen;Zhenglin Li;C. Hao;Jinsong Zhang
中科院分区：
文献类型：
--
作者：
Yuan-shou Shen;Zhenglin Li;C. Hao;Jinsong Zhang
采用活性AgCu钎料将C/C复合材料钎焊到镍基高温合金上，并在C/C和钎料之间添加氧化铝陶瓷中间层和/或锯齿形界面结构。添加Al 2 O3中间层的接头界面结合良好，接头组织韧性好，有效阻止了Ni和Ti的扩散和化学反应，降低了接头残余应力，提高了接头强度。此外，接头显着增强和增韧的建议之字形界面结构。其强化机理是由于钎缝的钉扎作用和增大的连接面积、减小的残余应力。具有锯齿形界面结构的C/C高温合金接头获得了73 MPa的较高抗弯强度。
C/C composite was brazed to a Ni-based superalloy using an active AgCu braze with an alumina ceramic interlayer and/or a zig–zag interfacial structure between the C/C and the braze. The joint with the Al2O3interlayer displayed perfectly bonded interface and ductile joint microstructure because the diffusion and chemical reactions of Ni and Ti are prevented, which in turn improved the joint strength due to the reduced residual stress. Moreover, the joint was significantly strengthened and toughened by the proposed zig–zag interfacial structure. The strengthening mechanism was attributed to the enlarged joining area, reduced residual stress and strong pinning effect of the braze spikes. A quite high bending strength of 73MPa was obtained from the C/C-superalloy joint with the zig–zag interfacial structure.