Microscale tribological behavior and in vitro biocompatibility of graphene nanoplatelet reinforced alumina

- Addition of 5 vol% GNP leads to a 39% enhancement in microscale wear resistance.
- It is shown that GNPs provide no intrinsic lubrication to the alumina matrix.
- GNP toughening by GNP pull-out and formation of fine (~100 nm) micro-cracking.
- GNPs inhibit sub-surface damage through energy dissipating mechanisms.
- Addition of GNPs has no cytotoxic effects on the proliferation of osteoblast cells.