Fabrication and characterization of friction stir–processed Mg-Zn-Ca biomaterials strengthened with MgO particles

Magnesium alloy composites play an important role in the biomaterials field. In this study, a novel Mg-Zn-Ca matrix composite was reinforced by adding 1.0 wt.% MgO nanoparticles via high shear casting process. Hereafter, friction stir processing (FSP) used to achieve good dispersion of particles and improve mechanical properties composites. After preparation materials, varied characterization performance test methods have been selected for comparison. The results illustrate that through FSP, corresponding microstructure as-cast MgO/Mg-Zn-Ca were significantly modified, best combination key parameters is 1200 rpm 60 mm/min rotational velocity traveling speed, respectively. optimized FSP treatment, grain size FSP-processed refined 42%, reach 1.04 μm. Due refinement redistribution particles, hardness increased 40%, 101.2 HV. Further, it displayed excellent corrosion resistance as well strength. Compared strengthening refinement, particle more dominant based on study. And meanwhile, modified grains added are beneficial nugget zones.