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采用Ni-Al-Ti作中间层,通过激光引燃自蔓延方法对Cf/Al复合材料与TiAl合金进行连接,研究中间层中Ti-Al含量对接头界面显微组织和力学性能的影响。接头中发生了母材的局部融化,并在两侧母材处生成了γ-Ni0.35Al0.30Ti0.35、NiA l3和Ni2Al3反应层。接头缺陷(如气孔、裂纹)降低了接头的致密度,并作为断裂源使接头强度急剧下降。添加Ti-Al可以改善接头致密度,并增强中间层产物与Cf/Al复合材料的附着力。通过改变Ti-Al含量,可以控制接头缺陷。当Ti-Al含量为0.1时,接头中无裂纹产生,致密度良好,强度达到最高值24.12 MPa.
The influence of Ti-Al content in the interlayer on the microstructure and mechanical properties of the joint interface was investigated by using Ni-Al-Ti as the intermediate layer and the Cf / Al composites and TiAl alloy by laser ignition self-propagating method. Local melting of the base material occurred in the joint, and γ-Ni0.35Al0.30Ti0.35, NiAl3 and Ni2Al3 reaction layers were formed on both sides of the base metal. Joint defects (such as pores and cracks) reduce the density of the joint and act as a source of fracture to sharply decrease the strength of the joint. Addition of Ti-Al improves joint densification and enhances the adhesion of the intermediate product to the Cf / Al composites. By changing the Ti-Al content, joint defects can be controlled. When the Ti-Al content is 0.1, no crack occurs in the joint, and the density is good, and the strength reaches the maximum value of 24.12 MPa.