The microstructures, high-cycle fatigue properties, fatigue crack growth and fatigue facture surfaces of spray-formed composite and its matrix alloy were investigated, respectively. The results show that the high-cycle fatigue properties of SiCp/Al–20Si composites are superior, as SiC particles improve the mechanical properties of composite. The fracture of Si and the interfacial debonding including both Al/Si and Al/SiC were the principle mechanisms in the fatigue fracture of composite materials. Detailed quantitative analyses indicates that ...
