Corrosion and tribocorrosion behavior of Ti6Al4V/xTiN composites for biomedical applications

Chávez, J.; Jiménez, O.; Bravo-Bárcenas, D.; Olmos, L.; Alvarado-Hernández, F.; González, Marco Aurélio Stumpf; Bedolla-Jacuinde, A.; Flores, M.

doi:10.1016/s1003-6326(22)65814-x

Cited by 5 publications

(3 citation statements)

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“…This drop is caused by the breakage of the passivation layer formed during the previous stage. The potential values registered in the rubbing stage result from the combination of the potentials of the passivated surface (on either side of the wear track) and the worn, de-passivated (on the wear track) surfaces [13]. In addition, the oscillations in this region indicate the continuous removal-regeneration of the passivation layer on the surface during the sliding of the counterpart.…”

Section: Resultsmentioning

confidence: 99%

“…Ta was added to accelerate the formation of precursor cells during bone ingrowth [29,30]. As the third material, Ti64 was reinforced with 10 wt-% TiN particles, which were expected to improve the wear resistance, as proposed in [13].…”

Section: Methodsmentioning

confidence: 99%

“…The second approach is processing a Ti64-matrix composite including hard ceramic particles. The wear rate of Ti64 composites reinforced with TiN and TiC particles can be divided by 20 in comparison with pure Ti64 [12,13]. Nevertheless, the addition of ceramic particles increases the stiffness of Ti64, which is undesirable, as emphasised above [14].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%