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Frequency optimization of pulsed magnetic field for microstructure and wear performance of SiCp/Al composites
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DOI：10.1080/10426914.2026.2682792.png)
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Abstract
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This study combined experiments and simulation to investigate how pulsed magnetic field frequency (0–10 Hz) affects solidification and wear performance of SiCp/Al composites. The optimal frequency of 2.5 Hz produced the most uniform SiC distribution, refined α-Al grains, and reduced porosity. At 10 Hz, the skin effect caused particle segregation. Simulations revealed that non-uniform Lorentz forces generate symmetric melt vortices, improving thermal homogeneity and mass transfer. Wear tests showed that the 5 Hz treatment lowered the friction coefficient by 21% and reduced the wear scar width by 18%, with a smoother worn surface. These improvements stem from the synergistic effects of uniform particle dispersion, grain refinement, and defect reduction, which enhance matrix load-bearing capacity and anti-wear ability. This work provides theoretical and practical guidance for applying pulsed magnetic fields to control solidification and improve the performance of aluminum matrix composites.
Keywords:
Pulsed magnetic field frequency
SiCp/Al composites
solidification microstructure
numerical simulation
tribological properties
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