Ti–6Al–4V alloy cortical bone screw production by powder injection molding method

Urtekin, Levent; Taşkın, Anıl

doi:10.1166/mex.2017.1378

Cited by 8 publications

(5 citation statements)

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“…In powder-injection molding, typically, powders smaller than 10 microns in size are used for ceramics, and spherical powders smaller than 20 microns in size are used for metals. 1,3,4,9 The chemical composition of Ti-6Al-4V is given in Table 1. Its powder morphology, determined with scanning electron microscopy, is given in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

“…At these temperatures, it was seen that as the viscosity increased, the shear rate decreased and the flow type became pseudo-plastic. In the literature; 1,3,4 it is expected that a successful feedstock has a viscosity lower than 1000 Pa.s and a shear rate of 100-10000 s -1 . As shown in Figure 6a, it was calculated that the viscosity of the PEG8000/PP/SA feedstock varied from 1001 Pa s to 72 Pa s and the shear rate from 92 s -1 to 1100 s -1 .…”

Section: Rheological Behavior Of the Ti-6al-4v Feedstockmentioning

confidence: 99%

“…The parameters related to molding were given in another study. 4 Mold-filling simulations were performed using the Autodesk Moldflow 2014 software. The rheological and thermal properties of the feedstock were measured and used for mold-filling simulation studies of the corti- cal-bone screw geometry.…”

Section: Cortical-bone Screw-implant Design and Simulationmentioning

confidence: 99%

“…The production of titanium and its alloys with PIM results in complex shapes, uniform microstructures and high performance. [4][5] The PIM production consists of four stages. The four-step process includes the stages of mixing, injection molding, debinding and sintering.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and simulation of feedstock for titanium-powder injection-molding cortical-bone screws

Urtekin¹,

Genç²,

Bozkurt³

2019

Mater. Tehnol.

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Titanium-powder injection molding is a combination of plastic injection and powder metallurgy. Using this technology, near-net titanium parts are produced. In this study, feedstock-development experiments were performed with Ti-6Al-4V powders and binders for the production of titanium cortical-bone screws. Critical solid-loading and optimum solid-loading values were determined to specify the most appropriate binder system and ratio by volume. The critical solid-loading rate was determined as 62 % by volume while the optimum solid-loading rate was 60 % by volume. The rheological properties of the feedstocks were obtained with a capillary rheometer, and the thermal properties with a TGA analysis. The rheological behavior and thermal properties of PW/PE/SA and PEG8000/PP/SA feedstocks at different mixing ratios were determined. A simulation of the flow was made with the Moldflow program, designing a screw and a mold. For the two different feedstocks, skeletal binders PP and PE were identified and simulations were carried out. The knowledge that the feedstock skeletal-binder properties predominate was obtained as the data for the flow in the mold in the light. Experiments and simulations showed that the water-based feedstock is a suitable binder system for the cortical-bone screw molding.

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Section: Methodsmentioning

confidence: 99%

Section: Rheological Behavior Of the Ti-6al-4v Feedstockmentioning

confidence: 99%

Section: Cortical-bone Screw-implant Design and Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication and simulation of feedstock for titanium-powder injection-molding cortical-bone screws

Urtekin¹,

Genç²,

Bozkurt³

2019

Mater. Tehnol.

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“…Ti alloys are more popular for biomedical implantation purposes as they show a satisfactory set of mechanical properties and good biocompatibility in comparison with stainless steel [5]. However, Ti alloy has a poor capability for inducing bone tissue regeneration, known as poor osseointegration properties [6], which contribute to their limitation in being used as bioimplant products.…”

Section: Introductionmentioning

confidence: 99%

Presintered Titanium-Hydroxyapatite Composite Fabricated via PIM Route

Mahmud

Sulong

Sharma

et al. 2021

Metals

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Ti6Al4V-HA composites have been recognized for their potential for biomedical implantation purposes. In the present study, Ti6Al4V-HA composites were fabricated by Powder Injection Molding (PIM) route. Ti6Al4V-HA feedstock at a ratio of 87:13 vol.% was prepared by using a binder system consisting of palm stearin (PS) and polyethylene (PE). The Critical Powder Volume Percentage (CPVP) value for Ti6Al4V-HA was 68 vol.%. Ti6Al4V-HA feedstock was developed at 66 vol.% powder loading. Ti6Al4V-HA feedstock showed pseudoplastic behaviour with a low viscosity and low activation energy of flow and was successfully injected into a tensile bar shape. The debinding process involved a solvent and thermal debinding operation. The debonded parts were sintered at 1300 °C, and the influence of the presintering stage on the physical and mechanical properties of the sintered parts was investigated. It was proven that the presintering stage was able to restrain the transformation of Ti6Al4V into Ti3Al (α2) as well as the decomposition of HA. These are key findings ideas for the designing of sintering parameters, where the decomposition of HA becoming the main problem in the sintering of Ti6Al4V-HA composites at a high temperature. The obtained results also showed that the sintered parts had a porous structure, which looked promising for their use in biomedical implantations. purposes.

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The investigation of sintering temperature and Ni interlayer effects on diffusion bonding in inserted metal injection molding

Subaşı

2020

Journal of Manufacturing Processes

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Ti–6Al–4V alloy cortical bone screw production by powder injection molding method

Cited by 8 publications

References 0 publications

Fabrication and simulation of feedstock for titanium-powder injection-molding cortical-bone screws

Fabrication and simulation of feedstock for titanium-powder injection-molding cortical-bone screws

Presintered Titanium-Hydroxyapatite Composite Fabricated via PIM Route

The investigation of sintering temperature and Ni interlayer effects on diffusion bonding in inserted metal injection molding

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