Composite Titanium Powder Coated with Carbon Black Particles Using Wasted Black Ink and Mechanical Properties of Its Extruded Material

摘要

In this study, the composite titanium (Ti) powder coated with un-bundled carbon blackrn(CB) particles was prepared via a wet process using black ink solution collected from the usedrnink cartridges of inkjet printing. Un-bundled CB particles were independently and uniformlyrndispersed in the black ink, and coated on the pure Ti powder surface by dipping the powders intornthe ink. These composite Ti powders were consolidated as Ti matrix composite (TMC)rnreinforced with CB particles by spark plasma sintering (SPS) and subsequent hot extrusion.rnSome of CB particles were dissolved into the Ti matrix as solid solution elements duringrnsintering. In-situ formed titanium carbide (TiC) dispersoids were uniformly distributed in thernextruded Ti composites. Carbon solid solution strengthening and TiC dispersion strengtheningrnwere effective for improving mechanical properties of the TMC. Consequently, the TMC showedrnan excellent balance of high tensile strength of 899 MPa and enough elongation of 18.7 % atrnroom temperature.