Metal Matrix Composites (MMCs), an advanced class of materials with
exceptional mechanical properties and tailored functionality have emerged as a
promising option for a wide range of applications. Graphene, a two-dimensional carbon
allotrope with remarkable properties, has the potential to further enhance the structural
integrity and mechanical performance of MMCs when integrated into them. Therefore,
this article reviews the results obtained from a thorough examination of the
microstructure and mechanical properties of metal-based composites, focusing on the
impact of graphene reinforcement. The microstructure and mechanical characteristics
of graphene-based MMCs are highly influenced by the amount of graphene present, the
process used, and the presence of defects. In general, graphene addition has shown
improvement in the mechanical strength, and hardness of MMCs due to refinement in
grain size. MMC characterization techniques such as scanning electron microscopy,
transmission electron microscopy, Raman spectrum and X-ray diffraction have been
discussed to understand the graphene’s dispersion, interfacial bonding with metal, and
crystallographic changes in MMC. Based on the outcomes, it can be concluded that
graphene-based MMCs have the potential to revolutionize a wide range of industries,
from aerospace and automotive to electronics and energy storage.
Keywords: Graphene, Hardness, Microstructure, and applications, Tensile strength.
