Design and characterization of Ti6Al4V/20CoCrMo−highly porous Ti6Al4V biomedical bilayer processed by powder metallurgy

Mihalcea, Elena; Vergara–Hernández, Héctor Javier; Jiménez, O.; Olmos, L.; Chávez, J.; Arteaga, Dante

doi:10.1016/s1003-6326(20)65486-3

Cited by 16 publications

(6 citation statements)

References 47 publications

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“…Since the Icorr value of Cp-Ti and Ti6Al4V is 0.70 µm/cm 2 and 1.50 µm/cm 2 respectively. These values are higher than that of Ti10Sn, Ti15Sn, and Ti20Sn alloys [68,69]. This shows their excellent corrosion resistance.…”

Section: Corrosion Resistancementioning

confidence: 78%

Synthesis and Characterization of Ti-Sn Alloy for Orthopedic Application

2021

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Titanium (Ti)-based alloys (e.g., Ti6Al4V) are widely used in orthopedic implant applications owing to their excellent mechanical properties and biocompatibility. However, their corrosion resistance needs to be optimized. In addition, the presence of aluminum and vanadium cause alzheimer and cancer, respectively. Therefore, in this study, titanium-based alloys were developed via powder metallurgy route. In these alloys, the Al and V were replaced with tin (Sn) which was the main aim of this study. Four sets of samples were prepared by varying Sn contents, i.e., 5 to 20 wt. %. This was followed by characterization techniques including laser particle analyzer (LPA), X-ray diffractometer (XRD), scanning electron microscope (SEM), computerized potentiostate, vicker hardness tester, and nanoindenter. Results demonstrate the powder sizes between 50 and 55 µm exhibiting very good densification after sintering. The alloy contained alpha at all concentrations of Sn. However, as Sn content in the alloy exceeded from 10 wt. %, the formation of intermetallic compounds was significant. Thus, the presence of such intermetallic phases are attributed to enhanced elastic modulus. In particular, when Sn content was between 15 and 20 wt. % a drastic increase in elastic modulus was observed thereby surpassing the standard/reference alloy (Ti6Al4V). However, at 10 wt. % of Sn, the elastic modulus is more or less comparable to reference counterpart. Similarly, hardness was also increased in an ascending order upon Sn addition, i.e., 250 to 310 HV. Specifically, at 10 wt. % Sn, the hardness was observed to be 250 HV which is quite near to reference alloy, i.e., 210 HV. Moreover, tensile strength (TS) of the alloys were calculated using hardness values since it was very difficult to prepare the test coupons using powders. The TS values were in the range of 975 to 1524 MPa at all concentrations of Sn. In particular, the TS at 10 wt. % Sn is 1149 MPa which is comparable to reference counterpart (1168 MPa). The corrosion rate of Titanium-Sn alloys (as of this study) and reference alloy, i.e., Ti6Al4V were also compared. Incorporation of Sn reduced the corrosion rate at large than that of reference counterpart. In particular, the trend was in decreasing order as Sn content increased from 5 to 20 wt. %. The minimum corrosion rate of 3.65 × 10−9 mm/year was noticed at 20 wt. % than that of 0.03 mm/year of reference alloy. This shows the excellent corrosion resistance upon addition of Sn at all concentrations.

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Section: Corrosion Resistancementioning

confidence: 78%

Synthesis and Characterization of Ti-Sn Alloy for Orthopedic Application

2021

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“…An appropriate architecture is needed for bone tissue engineering in order to produce the porous structure. An ambience that can support cell infiltration, migration, vascularization, nutrient and oxygen flow, and waste material removal while withstanding external loading stresses is provided by adequate porosity of an appropriate size and pores interconnectivity [54]. Three factors-pore size, interconnectivity, and porosity volume determines stretch of cell extension internally.…”

Section: Porositymentioning

confidence: 99%

A critical review on biomaterials using powder metallurgy method

Abraham,

Venkatesan

2024

Eng. Res. Express

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Implants play a vital role in a person's life because losing any body part to function less actively, which makes the sufferer uncomfortable. Implants should be both biocompatible and non-toxic to the body is essential to achieve its biocompatibility nature. To create orthopaedic, dental, and surgical implants, biomaterials were divided into three categories: metallic, polymeric, and ceramic. Materials based on polymers indicate their degree of adaptability in terms of sutures, medication delivery, etc. Ceramic materials are known for their high compressive strength and inert behaviour, which combine aesthetic qualities. Metallic biomaterials are enhanced by their high strength and resistance to fracture. One of the most promising techniques for improving a material's mechanical qualities is powder metallurgy. Powder metallurgy involves blending of powders, compaction of blended powder, sintering and mechanical test. Samples with varying compact pressures, sintering temperatures, and sintering times were created using the powder metallurgy process. The aim of the research work is to get the concept of powder metallurgy, biomaterials commercially available for orthopaedic and dental applications, properties of biomaterial and methods to fabricate the material effectively.

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“…These factors contribute substantially to the possibility of contamination. However, as shown by [63,64], the presence of pores for biomaterials intended for implants, such as pins and bone plates, is extremely important, since the concentration of macropores interconnected with micropores increases penetration of body fluids, which improves the number of cell bonds, protein adsorption and osteogenic differentiation. Thus, despite the great inherent risk of the process, the use of porous materials is considered very advantageous, and a study of the potential for contamination is necessary.…”

Section: Wettability and Hemocompatibility Analysis Of Individual Compositions And Fgmmentioning

confidence: 99%

Production and Characterization of a 316L Stainless Steel/β-TCP Biocomposite Using the Functionally Graded Materials (FGMs) Technique for Dental and Orthopedic Applications

Kuffner

Capellato

Ribeiro

et al. 2021

Metals

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Metallic biomaterials are widely used for implants and dental and orthopedic applications due to their good mechanical properties. Among all these materials, 316L stainless steel has gained special attention, because of its good characteristics as an implantable biomaterial. However, the Young’s modulus of this metal is much higher than that of human bone (~193 GPa compared to 5–30 GPa). Thus, a stress shielding effect can occur, leading the implant to fail. In addition, due to this difference, the bond between implant and surrounding tissue is weak. Already, calcium phosphate ceramics, such as beta-tricalcium phosphate, have shown excellent osteoconductive and osteoinductive properties. However, they present low mechanical strength. For this reason, this study aimed to combine 316L stainless steel with the beta-tricalcium phosphate ceramic (β-TCP), with the objective of improving the steel’s biological performance and the ceramic’s mechanical strength. The 316L stainless steel/β-TCP biocomposites were produced using powder metallurgy and functionally graded materials (FGMs) techniques. Initially, β-TCP was obtained by solid-state reaction using powders of calcium carbonate and calcium phosphate. The forerunner materials were analyzed microstructurally. Pure 316L stainless steel and β-TCP were individually submitted to temperature tests (1000 and 1100 °C) to determine the best condition. Blended compositions used to obtain the FGMs were defined as 20% to 20%. They were homogenized in a high-energy ball mill, uniaxially pressed, sintered and analyzed microstructurally and mechanically. The results indicated that 1100 °C/2 h was the best sintering condition, for both 316L stainless steel and β-TCP. For all individual compositions and the FGM composite, the parameters used for pressing and sintering were appropriate to produce samples with good microstructural and mechanical properties. Wettability and hemocompatibility were also achieved efficiently, with no presence of contaminants. All results indicated that the production of 316L stainless steel/β-TCP FGMs through PM is viable for dental and orthopedic purposes.

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Design and characterization of Ti6Al4V/20CoCrMo−highly porous Ti6Al4V biomedical bilayer processed by powder metallurgy

Cited by 16 publications

References 47 publications

Synthesis and Characterization of Ti-Sn Alloy for Orthopedic Application

Synthesis and Characterization of Ti-Sn Alloy for Orthopedic Application

A critical review on biomaterials using powder metallurgy method

Production and Characterization of a 316L Stainless Steel/β-TCP Biocomposite Using the Functionally Graded Materials (FGMs) Technique for Dental and Orthopedic Applications

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