Dependence of the Mechanical Properties of Al–Si–Cu–WO3 Nanoparticle Alloy Composite Material on the Method of Introducing the Reinforcing Phase

Abstract—The mechanical properties of composite materials for antifriction purposes based on an Al–Si–Cu alloy reinforced with WO₃ nanoparticles with or without copper have been investigated. The best combination of properties was found in composites produced by adding 10 wt % WO₃ powder or 1 wt % WO₃ + Cu powder mixture to the alloy at a mass ratio of WO₃ : Cu = 1 : 3. The mechanical properties of these composites under compression are offset yield strength \(\sigma _{{0.2}}^{{\text{c}}}\) = 240 МPa and buckling stress σ_cr = 300 MPa, which is 4 and 2.4 times higher, respectively, than those of Al—Si–Cu matrix alloy. The mechanical properties of these composites in bending are \(\sigma _{{0.25}}^{{\text{b}}}\) = 250–260 MPa and \(\sigma _{{\text{u}}}^{{\text{b}}}\) = 380–390 MPa, which are 5 times higher than those of matrix alloy.