Metal Matrix Nanocomposites (MMNCs) often show excellent properties as compared
to their non-reinforced alloys due to either the achieved grain refinement or Orowan strengthening.
Especially in light metals such as aluminium and magnesium as the matrix has the potential to be
significantly improved in relation to mechanical properties. Functionalisation can also be achieved
in some cases. However, the challenge lies in the homogeneous distribution of the ceramic nanoparticles
in the melt if MMNCs have been processed via melt metallurgical processes. The large surface
area of the nanoparticles generates large van der Waals forces, which need to be overcome.
Furthermore, the wettability of the particles with molten metal is difficult. Additional forces can be
applied by ultrasound, electromagnetic stirring, or even high-shearing. In this paper, properties of
MMNCs with a light metal matrix, which have been produced with the High-Shearing Dispersion
Technique are discussed. First, the process with its different characteristics and the underlying theory
is presented, and then property improvements are discussed by comparing MMNCs to their matrix