Modeling of volumetric deformation during compaction of Al-SiC composite materials based on mechanically activated batch

Abstract

Annotation A 3D Spline model of the effect of the silicon carbide content Csic and the cold compaction pressure p on the bulk deformation of the powder molding ॉν during the cold compaction of the Al-SiC charge was constructed. The nonlinear character of the dependence ॉν(p) is established for the studied values of the silicon carbide content. The two-stage nature of the cold compaction of the Al-SiC powder mixture was revealed, which is characterized by intensive compaction at the initial stage. A sigmoidal model of cold compaction of a powder mechanically activated Al-SiC charge, which takes into account the initial stage of lightweight structural compaction, is constructed. The dependences of the influence of the SiC powder content on the coefficients of the sigmoidal cold compaction equation are established. A logistic model of the influence of CsiC on the coefficients of the sigmoidal equation of cold compaction and the average size of agglomerates formed during the mechanical activation of a mixture of Al-SiC composite powder material is proposed. The energy equation of hot compaction is obtained, the value of the compressibility coefficient is determined, and a linear equation is constructed that relates the relative densities before and after hot compaction of the Al-SiC composite material.