Effect of the Ag addition on the compressibility, sintering and properties of Ti6Al4V/xAg composites processed by powder metallurgy

Solorio, Victor Manuel; Vergara–Hernández, Héctor Javier; Olmos, L.; Bouvard, D.; Chávez, J.; Jiménez, O.; Camacho, N.

doi:10.1016/j.jallcom.2021.161813

Cited by 13 publications

(9 citation statements)

References 32 publications

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“…It can also be noticed that the surface of the particles is not covered by Ag, which confirms that the liquid only densified the porosity left by the particle packing. In addition, it was confirmed that some Ag diffuses in a solid state into the Ti64 net to form thin lamellae of the Ti 2 Ag intermetallic ( Figure 2 e,f), as was reported for alloys processed by casting [ 20 , 22 ] or composites fabricated by powder metallurgy [ 34 ].…”

Section: Resultssupporting

confidence: 76%

“…At 940 °C, the softening of Ag particles can generate a densification by rearrangement since the melting point is close. At 962 °C, the liquid Ag can fully spread among the interparticle pores left by the Ti64 particles, as it was reported in [ 34 ]. The strain rate could also confirm that the addition of large pores does not change the behavior of the densification by liquid phase.…”

Section: Resultssupporting

confidence: 69%

“…Finally, the samples were sintered at 1100 °C with a heating rate of 10 °C/min and a soaking time of 5 min in the vertical dilatometer. The sintering thermal cycle was determined in a previous work [ 34 ].…”

Section: Methodsmentioning

confidence: 99%

“…Due to the above-mentioned process, a liquid phase is formed, which drives the densification process during sintering. It was reported that the optimal concentration of Ag in Ti is between 20 and 25 wt.% [ 33 ] and Ag in Ti64 alloy is 20 wt.% [ 34 ]. This leads to almost fully dense materials and to stable TiAg and Ti 2 Ag phases [ 23 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultssupporting

confidence: 76%

Section: Resultssupporting

confidence: 69%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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“…The low quantity of Ag has likely diffused in the Ti network and is thus difficult to detect. In a previous work [33], XRD patterns evidenced that Ti64/5Ag composites keep such lamellar microstructure. The remaining pores are nearly spherical and likely isolated due to the high relative density reached, around 96%.…”

Section: Resultsmentioning

confidence: 89%

Fabrication of tailored Ti6Al4V-based materials by conventional powder metallurgy for bone implant applications

et al. 2023

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This works proposes a methodology for fabricating materials with specific characteristics mimicking human bones. A Ti64 alloy powder was used as the base material and it was mixed with Ag, Ta, TiN and salt particles to obtain different features. A hip-bone like component was fabricated, including a highly porous core of Ti64/25Ta/5Ag and a compact outer shell of Ti64/5Ag that is supposed to improve corrosion and osseointegration. Besides, a harder cover surface in Ti64/10TiN composite should increase the wear resistance. The green component was sintered at 1260°C in argon. Its Young's modulus was close to the one of bones due to the added porosity, which also provided a permeability close to the one reported for trabecular bones. Tribocorrosion behaviour in simulated body fluid was improved by TiN addition. In conclusion, the proposed processing route was able to produce complex components fulfilling specific features required for human bone replacement.

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A Novel Hybrid Additive Manufacturing Methodology for the Development of Ti6Al4V Parts

Singh,

Kumar,

Sharma

2023

J. of Materi Eng and Perform

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Effect of the Ag addition on the compressibility, sintering and properties of Ti6Al4V/xAg composites processed by powder metallurgy

Cited by 13 publications

References 32 publications

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

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

Fabrication of tailored Ti6Al4V-based materials by conventional powder metallurgy for bone implant applications

A Novel Hybrid Additive Manufacturing Methodology for the Development of Ti6Al4V Parts

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