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.
|Number of pages||9|
|Journal||Journal of Materials Processing Technology|
|State||Published - May 2018|
Bibliographical noteFunding Information:
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China under grant no. 51075101 . Guangjie Feng acknowledges the support from the China Scholarship Council for 1 year’s study at the University of Maryland, College Park. DPS acknowledges the support through the Distinguished 1000 Plan Foreign Professor appointment at the Harbin Institute of Technology, PR China.
© 2017 Elsevier B.V.
- C/Al composites
- Mechanical properties
- Self-propagating high-temperature synthesis
- TiAl alloys
ASJC Scopus subject areas
- Ceramics and Composites
- Computer Science Applications
- Metals and Alloys
- Industrial and Manufacturing Engineering