LAUSR

Abstract A sort of biodegradable magnesium-based nanocomposites improved by nano-sized NiTi particles has been offered in the current research with the evaluations for implant application. The samples were provided through mechanical alloying followed by sintering; the assessments consisted of microstructure, mechanical properties, and in-vitro biocompatibility. The impacts of integrating 15, 30, and 45 wt% of NiTi nano-particles on the characteristics of Mg–3Zn-0.5Ag magnesium alloy matrix have been investigated. The addition of 15 wt% of NiTi led to a decline in the grain size by 10.5%, an increase in the compressive strength by 56%, and a rise in the elongation by 7.6% as compared to the matrix; whereas further reinforcement addition reduced the elongation and compressive strength. The addition of 15 wt% NiTi causes a minor increase in corrosion rate, but incorporating 30 and 45 wt% of NiTi content result a major increase in corrosion rate. The improved compressive mechanical properties may be ascribed to Hall-Petch impact, the load transfer from matrix to NiTi particles, Orowan strengthening mechanism, and locking of dislocations owing to the occurrence of hard NiTi reinforcement particles. In-vitro biocompatibility tests such as MTT and DAPI assay revealed that the nanocomposites are appropriate for medical uses. It may be stated that the nanocomposite comprising 15 wt% of NiTi can be used appropriately as an orthopedic implant biomaterial.