The SiC_P/6066Al composites reinforced by different surface-treated SiC particles were fabricated by a powder metallurgy route.The microstructures and mechanical properties of the composites were studied by optical microscopy(OM),scanning electron microscopy(SEM),transaction electron microscopy(TEM),X-ray and tensile test,respectively.Dynamic modulus and damping mechanism of 12%SiC_P/6066Al composites were analyzed by multifunctional internal friction measurement(DMA). The effects of interfacial fea...