Abstract A high-efficiency brazing method was developed to join Cf/Al composites to TiAl alloys with the assistance of laser-induced exothermic reaction of a Ni-Al-Zr interlayer. The microstructure and mechanical properties of the Cf/Al-TiAl joint were investigated. The joint interfacial structure represented TiAl alloys/Al3NiTi2/NiAl+Ni-Al-Zr+Al-Cu-Ti+Ag(s,s)/(Ni,Ti,Zr)Al3/Cf/Al composites. A ∼ 400 nm thick Ti and Zr rich layer was formed around carbon fibers, largely enhancing the bonding quality on the Cf/Al side. The thickness of AgCu foils on each side and the brazing pressure influenced the interfacial reactions and the joint morphology. When the thickness of AgCu foils was 100 μm and the brazing pressure was 4 MPa, the joint was free of defects, and had a maximum shear strength of 71.6 MPa.

中文翻译：

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C f /Al-TiAl激光辅助钎焊接头的组织和力学性能

摘要 开发了一种利用激光诱导 Ni-Al-Zr 夹层的放热反应将 Cf/Al 复合材料与 TiAl 合金连接的高效钎焊方法。研究了Cf/Al-TiAl接头的显微组织和力学性能。接头界面结构为 TiAl 合金/Al3NiTi2/NiAl+Ni-Al-Zr+Al-Cu-Ti+Ag(s,s)/(Ni,Ti,Zr)Al3/Cf/Al 复合材料。在碳纤维周围形成了约 400 nm 厚的 Ti 和 Zr 富集层，大大提高了 Cf/Al 侧的结合质量。每侧 AgCu 箔的厚度和钎焊压力影响界面反应和接头形态。当AgCu箔的厚度为100 μm，钎焊压力为4 MPa时，接头无缺陷，最大剪切强度为71.6 MPa。