Vacuum Brazing of Aluminum Metal Matrix Composites (70 Vol.% SiCp/Al) Using Al-15Cu-8.5Si-4Ni-1.5Mg Filler Metal

Juan Li; Ke Hong Wang

doi:10.4028/www.scientific.net/AMM.633-634.760

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 633-634Vacuum Brazing of Aluminum Metal Matrix Composites...

Vacuum Brazing of Aluminum Metal Matrix Composites (70 Vol.% SiCp/Al) Using Al-15Cu-8.5Si-4Ni-1.5Mg Filler Metal

Abstract:

This work aims at brazing 70 vol.% SiCp/Al composites using Al-15Cu-8.5Si-4Ni-1.5Mg alloy powder as filler metal. The microstructures and shear strengths of the joints made with 70 vol. % SiCp/Al composites at different brazing temperature and different holding time were examined. It is found that the brazing temperature has an apparent effect on the quality of the joints. The sample brazed at 580 °C, with the holding time of 90 min demonstrates the best metallurgical bonding. The joint mainly contains α-phase, flake-like eutectic silicon, small amounts of primary silicon and bright white θ (Al₂Cu) phase. The maximum shear strength of the brazed joint is 49.7MPa, and the fracture surface shows the characteristic of brittle fracture.

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Periodical:

Applied Mechanics and Materials (Volumes 633-634)

Pages:

760-763

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.633-634.760

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Online since:

September 2014

Authors:

Juan Li*, Ke Hong Wang

Keywords:

Hold Time, SiCp-Al Composite, Tempurature, Vacuum Brazing

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