Alloy Design, Thermodynamics, and Electron Microscopy of Ternary Ti-Ag-Nb Alloy with Liquid Phase Separation

Nagase, Takeshi

doi:10.3390/ma13225268

Cited by 2 publications

(1 citation statement)

References 60 publications

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“…Therefore, the powder metallurgy technique offers an alternative to fabricating such alloys by reducing the processing temperatures [ 23 , 27 , 29 , 30 ]. This is possible since titanium is immiscible with various metals [ 31 ], e.g., Ag [ 32 ]. Due to the above-mentioned process, a liquid phase is formed, which drives the densification process during sintering.…”

Section: Introductionmentioning

confidence: 99%

Ti64/20Ag Porous Composites Fabricated by Powder Metallurgy for Biomedical Applications

et al. 2022

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We present a novel Ti64/20Ag highly porous composite fabricated by powder metallurgy for biomedical applications and provide an insight into its microstructure and mechanical proprieties. In this work, the Ti64/20Ag highly porous composites were successfully fabricated by the space holder technique and consolidated by liquid phase sintering, at lower temperatures than the ones used for Ti64 materials. The sintering densification was evaluated by dilatometry tests and the microstructural characterization and porosity features were determined by scanning electron microscopy and computed microtomography. Permeability was estimated by numerical simulations on the 3D real microstructure. Mechanical properties were evaluated by simple compression tests. Densification was achieved by interparticle pore filling with liquid Ag that does not drain to the large pores, with additional densification due to the macroscopical deformation of large pores. Pore characteristics are closely linked to the pore formers and the permeability was highly increased by increasing the pore volume fraction, mainly because the connectivity was improved. As expected, with the increase in porosity, the mechanical properties decreased. These results permitted us to gain a greater understanding of the microstructure and to confirm that we developed a promising Ti64/20Ag composite, showing E of 7.4 GPa, σy of 123 MPa and permeability of 3.93 × 10−11 m2. Enhanced adaptability and antibacterial proprieties due to Ag were obtained for bone implant applications.

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