Effect of CuO and SnO₂ particle size on hot extrusion deformation of AgCuOSnO₂: Finite element simulation and experimental study

Abstract

The finite element model is established according to the experimental results, and then the experimental results are verified by simulation calculation. In terms of the combination of finite element analysis and experiment, the effect of particle size of CuO and SnO₂ on the stress, strain and microstructure of AgCuOSnO₂ composite during hot extrusion was studied. The results illustrate that with the decrease of particle size, the dispersion of the second phase increases gradually, while the possibility of “tail shrinkage” of the billet decreases continuously; cubic CuO will evolve to fibrosis, and the degree of fibrosis will increase with the decrease of the particle size and ring clusters. Specifically, the degree of fibrosis at the middle end of the billet is higher than that at the front end, the degree of fibrosis at the front end is higher than that at the back end, and the degree of fibrosis on the surface is higher than that in the core; part of CuO fibers will bend, and the degree of buckling strength is positively correlated with the size of particles and their annular clusters. Additionally, there is fiber CuO in the front and back end of the billet that are inconsistent with the extrusion direction, and the degree of difference was negatively correlated with the particle size.

Keywords

AgCuOSnO₂ composite material / CuO / SnO₂ / finite element analysis / microstructural evolution

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