Effects of SPS parameters on the mechanical properties and microstructures of titanium reinforced with multi-wall carbon nanotubes produced by hot extrusion.

摘要

The effects of spark plasma sintering (SPS) temperatures and times on the mechanical properties and microstructures of titanium (Ti) reinforced with multi-wall carbon nanotubes (MWCNTs) were investigated. The Ti powders were coated with MWCNTs via a wet process using a zwitterionic surfactant solution containing 2.0 wt.% of MWCNTs. The coated Ti powders were consolidated by SPS process at various temperatures and times. All sintered billets were subsequently extruded at 1000°C. The mechanical properties responses of these extruded Ti composites showed the decrease of yield and tensile strength when higher consolidation temperatures were used. The microstructures of those Ti composites were observed using optical microscopy and scanning electron microscopy. All of the results were used to select the suitable condition for fabrication of Ti/MWCNTs composite materials.