Retraction Note to: Sintered Aluminum–Graphene Nano-Bio Composite Materials for the Medical Application

It is known that graphene stronger than steel. characterized by extremely high values of the Young's modulus (up to 1 TPa), strength (~125 GPa) and thermal conductivity (~5000 W/(m · K)). Therefore, in this work it used obtain nano-bio composite materials aluminum–graphene using powder metallurgy methods, particular high-energy ball grinding followed vacuum sintering. Sintered were evaluated modern methods microstructure analysis, such as scanning electron microscopy with field emission (FE-SEM), energy dispersion spectroscopy (EDS), transmission (TEM) Raman for qualitative quantitative analysis aluminum characteristics. According results research, a homogeneous distribution components observed structure material over given scan areas. The relative density after sintering ≈97.5%. Data on electrical aluminum-graphene nano-structured bio-composite provide grounds their use bone engineering.