A new titanium matrix composite reinforced with Ti-36Nb-2Ta-3Zr-0.35O wire
Abstract Pure Ti shows promising performance for biomedical applications, but its strength needs to be greatly improved. In this work, Ti-36Nb-2Ta-3Zr-0.35O (TNTZO) (wt.%) wire was added to reinforce titanium to prepare titanium matrix composites (TMC) through Spark Plasma Sintering (SPS). The effects of the sintering temperature on microstructures and mechanical properties were investigated. The results showed that with the increasing of the sintering temperature from 800 to 1100°C, the diffusion thickness between the matrix and the wires increases from 5 to 200μm. α' phase was observed in the diffusion layer at 1000 and 1100°C. Both the volume fraction and the lamellar thickness of α' phase increase with the sintering temperature increasing. The mechanical properties of the TMC were significantly improved by the addition of TNTZO wire, especially tensile strength. The TMC sintered at 900°C shows a tensile strength as high as 768MPa and good ductility (12.4%). Mechanical properties are also correlated with the microstructure of the matrix and the phase constitutions in the diffusion layer. Highlights A new titanium matrix composite (TMC) reinforced with TNTZO wire was prepared by Spark Plasma Sintering. α' phase was observed in the diffusion layer at 1000 and 1100°C. The mechanical properties of the TMC were significantly improved by the addition of TNTZO wire. The TMC sintered at 900°C shows a tensile strength as high as 768MPa and good ductility (12.4%). Graphical abstract [DISPLAY OMISSION]
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