Abstract
The successful joining of carbon fiber-reinforced aluminum matrix (Cf/Al) composites and TC4 alloy can produce composite structure and meet the demands of lightweight in aerospace field. Up to now, few experimental researches have been reported on the joining of Cf/Al composites and TC4 alloy. In this study, the AgCu foils and Ni–Al–Zr compact were designed for the self-propagating high-temperature synthesis joining of these two materials. Cf/Al composites were joined with a reactive Ti plated on its joining surface. The typical microstructure of TC4/(AgCu/Ni–Al–Zr/AgCu)/Ti/Cf/Al joint was analyzed, and the effects of joining condition on microstructural evolution of the SHS joint were investigated. A thin reaction layer of Ni–Al–Ti intermetallic compounds was formed adjacent to the TC4 alloy. As a result, AgCu foils could reduce the effect of reaction heat on the substrates and improve the joint shear strength. When the thickness of AgCu foils reaches 150 μm, the Ni–Al–Zr interlayer mainly acts as auxiliary heat source. High joining pressure caused the active elements to diffuse into Cf/Al composites and weakened the shear strength of the joint. Finally, the joint shear strength could reach 36.4 MPa when the AgCu foils were 50 μm and the joining pressure was 2 MPa.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Nos. 51975149 and 51905055) and the Central Universities Project (No. 2019CDXYCL0031).
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Shen, L., Li, ZR., Feng, GJ. et al. Self-propagating synthesis joining of Cf/Al composites and TC4 alloy using AgCu filler with Ni–Al–Zr interlayer. Rare Met. 40, 1817–1824 (2021). https://doi.org/10.1007/s12598-020-01520-3
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DOI: https://doi.org/10.1007/s12598-020-01520-3